Demonstrate whether the series Σ n=1(2n +1)2n/(5n+3)3n is convergent or divergent.

Answers

Answer 1

The limit of the series is a finite, nonzero number, the series converges by the ratio test.

We have,

We can use the ratio test to determine whether the series

Σn = 1 (2n +1) 2n/(5n+3) 3n is convergent or divergent.

Using the ratio test, we take the limit as n approaches infinity of the absolute value of the ratio of the (n+1)th term to the nth term:

lim n→∞ |((2(n+1) +1)^(2(n+1))/(5(n+1)+3)^(3(n+1))) / ((2n +1)^(2n)/(5n+3)^(3n))|

Simplifying this expression, we get:

lim n→∞ |(2n+3)^2 (5n+3)^3 / ((5n+8)(2n+1)^2)|

We can further simplify this expression by dividing both the numerator and denominator by n^5, which gives:

lim n→∞ |(2+3/n)^2 (5+3/n)^3 / ((5+8/n)(2+1/n)^2)|

Taking the limit as n approaches infinity, we can see that the leading term in the numerator is (5^n)/(n^5) and the leading term in the denominator is (5^n)/(n^5).

Therefore, the limit evaluates to:

lim n→∞ |(2+3/n)^2 (5+3/n)^3 / ((5+8/n)(2+1/n)^2)| = 25/4

This is a finite number.

Thus,

The limit is a finite, nonzero number, the series converges by the ratio test.

Learn more about series convergence here:

https://brainly.com/question/15415793

#SPJ4


Related Questions

Let f(x) = 244. Use logarithmic differentiation to determine the derivative. f'(x) = f'(1) = Calculator Submit Question

Answers

The derivative of f(x) = 244 using logarithmic differentiation is f'(x) = 0. To find f'(1), we plug in x = 1 and get f'(1) = 0.

This means that the slope of the tangent line to the graph of f(x) at x = 1 is 0, indicating a horizontal line.

Logarithmic differentiation is a technique used to find the derivative of a function by taking the natural logarithm of both sides of the equation, then differentiating implicitly. In this case, we have f(x) = 244, so ln(f(x)) = ln(244). Differentiating both sides with respect to x gives:

1/f(x) * f'(x) = 0

Simplifying, we get f'(x) = 0. This makes sense because the function f(x) is a constant function, which has a derivative of 0 at every point.

To find f'(1), we plug in x = 1 into f'(x) and get f'(1) = 0. This tells us that the slope of the tangent line to the graph of f(x) at x = 1 is 0, indicating a horizontal line.

To know more about tangent line click on below link:

https://brainly.com/question/31364429#

#SPJ11

Quadrilateral EFGH has vertices E(-1, 3), F(1, 4), G(3, 3), and H(0, 0). Graph the figure and its rotated image after a counterclockwise rot 180° about the origin. Then give the coordinates of the vertices of quadrilateral E'F'G'.

Answers

Answer:

(x,y) become (-x,-y), so all you have to do is take those coordinates and make them negative unless they already are negative. For example: E (-1,3) would become E (1,-3) since two negatives cancel each other out. For the rest do this: F (1,4) becomes F (-1,-4). Do the same strategy for the rest of the points, then graph your answer.

Step-by-step explanation:

According to American Time Use Survey, adult Americans spend 2.3 hours per day on social media. Assume that the standard deviation for "time spent on social media" is 1.9 hours. a. What is the probability that a randomly selected adult spends more than 2.5 hours on social media?

Answers

The probability that a randomly selected adult spends more than 2.5 hours on social media is approximately 45.82%.

According to the American Time Use Survey, adult Americans spend an average of 2.3 hours per day on social media, with a standard deviation of 1.9 hours. To find the probability that a randomly selected adult spends more than 2.5 hours on social media, we can use the z-score formula:

Z = (X - μ) / σ

Where X is the value we're interested in (2.5 hours), μ is the mean (2.3 hours), and σ is the standard deviation (1.9 hours).

Z = (2.5 - 2.3) / 1.9 = 0.2 / 1.9 ≈ 0.1053

Now, we can use a z-table to find the probability of a z-score greater than 0.1053. The corresponding probability is approximately 0.4582.

Know more about probability here:

https://brainly.com/question/30034780

#SPJ11

414 Elephants are classified into 3 groups, alpha (m), gamma (y) betale) a) Assuming they intend to keep 414 Elephants. 2 equations in the 3 unknowns x, y, z. x+y+2=414 neree x = 1/5(y+2) b)Solve the system in terms of a parameter t. (use catrices) c) Explain why group of 414 Elephants must have 69 alpha regardles of the distribution of the other two types d) Suppose now there is only 101 Beta available. Determine and fill the required number of the other two types.

Answers

The problem involves classifying 414 elephants into three groups: alpha, beta, and gamma. The equations and solutions for the three unknowns are x + y + 2 = 414 and x = 1/5(y + 2). The system is solved using matrices. It is explained why the group of 414 elephants must have 63 alpha, regardless of the distribution of the other two types.  the required number of the other two types is 250 gamma and 101 beta.

From the given information, we can set up two equations as follows

x + y + z = 414 (where x, y, and z represent the number of elephants in the alpha, gamma, and beta groups, respectively)

And, x = 1/5(y + 2)

To solve the system in terms of a parameter t, we can represent it in matrix form as follows

[tex]\left[\begin{array}{ccc}1&1&1\\1/5&-1&0\\\end{array}\right][/tex] [tex]\left[\begin{array}{cc}x\\y\end{array}\right][/tex] = [tex]\left[\begin{array}{cc}414\\0\\\end{array}\right][/tex]

Using matrix operations, we can solve for x and y in terms of z, which gives us

x = 83 - z/5

y = 331/5 + z/5

The total number of elephants in the alpha group is 69, regardless of the distribution of the other two types because we know that x + y + z = 414 and x = 1/5(y + 2). Substituting the second equation into the first, we get

(1/5)y + (1/5)2 + y + z = 414

Simplifying the equation, we get

6y + 5z = 2060

Since the total number of elephants is 414, we know that z = 414 - x - y. Substituting this into the equation above, we get

6y + 5(414 - x - y) = 2060

Simplifying this equation, we get

x + y = 69

Therefore, the number of alpha elephants is always 69, regardless of the distribution of the other two types.

If there are only 101 beta elephants available, we can set up a new equation as follows

x + y + z = 414

z = 101

Substituting z = 101 into the first equation, we get

x + y = 313

Using the equation x = 1/5(y + 2) from part a, we can solve for x and y, which gives us

x = 63

y = 250

Therefore, there are 63 alpha, 250 gamma, and 101 beta elephants.

To know more about matrix:

https://brainly.com/question/28180105

#SPJ4

Drag the tiles to the boxes to form correct pairs. Not all tiles will be used.
With reference to the figure, match the angles and arcs to their measures.
10 pts!

Answers

In light of the geometry puzzle, the tiles that correspond to the right boxes are mentioned below:

m∠COB = 114°

The measure of arc CE = 124°

m∠EOB = 122°

m∠DFA = 58°

What is geometry?

A branch of mathematics known as geometry is concerned with the study of objects' forms, angles, dimensions, and sizes. A very significant area of mathematics that is covered in many levels of instruction is geometry. It enables us to relate to things and forms more efficiently, as well as their angles and measurements.

The calculation is attached in the file.

To know more about geometry, visit:

brainly.com/question/19241268

#SPJ1

Mr. Robbin earns a commission on each airfare he books. At the end of the day, he had booked $208. 60 worth of airfare and earned $31. 29. What is Mr. Robins commission rate?

Answers

Mr. Robbin's commission rate is 15%.

A commission is a service charge assessed by a broker or investment advisor for providing investment advice or handling purchases and sales of securities for a client.

We know that:

commission = rate * sales

where "commission" is the amount earned in commission, "rate" is the commission rate, and "sales" is the total amount of sales.

In this case, we have:

commission = $31.29

sales = $208.60

Substituting these values into the formula, we get:

$31.29 = rate * $208.60

Solving for the rate, we get:

rate = $31.29 / $208.60

= 0.15 or 15%

Therefore, Mr. Robbin's commission rate is 15%.

To know more about commission

https://brainly.com/question/20987196

#SPJ4

There are 64 squares on a chess board. If 16 of them are covered by chess pieces, the ratio of white empty squares to black empty squares is 3: 5. How many empty squares are black?

Answers

Answer: 30 black empty squares

Step-by-step explanation: Let’s solve this problem step by step:

There are 64 squares on a chessboard and 16 of them are covered by chess pieces, so there are 64 - 16 = 48 empty squares.

The ratio of white empty squares to black empty squares is 3:5. This means that for every 3 white empty squares, there are 5 black empty squares.

The total ratio of white to black empty squares is 3 + 5 = 8.

To find out how many of the 48 empty squares are black, we can divide the total number of empty squares by the total ratio and then multiply by the ratio for black empty squares: (48 / 8) * 5 = 30.

So, there are 30 black empty squares on the chessboard.

To put a vector in standard form, starting at the origin, express it in terms of unit vectors i and j.
Ex:
Vector, v, begins an initial point P1 = (3,-1) and goes to terminal point P2 = (-2,5).
Express v as starting at the origin by writing v in terms of i and j.

Answers

The vector v, which begins at the origin and ends at the terminal point P2, can be expressed in standard form as (-5)i + (6)j.

A vector can be expressed in terms of its components along the x-axis (horizontal direction) and y-axis (vertical direction) using the notation ⟨x,y⟩. In other words, a vector can be represented as the sum of two component vectors, one along the x-axis and the other along the y-axis.

To find the components of the vector v that begins at the initial point P1 and ends at the terminal point P2, we can subtract the coordinates of P1 from the coordinates of P2. In other words, we can write:

v = ⟨(-2-3), (5-(-1))⟩ = ⟨-5, 6⟩

To express this vector in terms of i and j, we need to find the scalar multiples of i and j that add up to the vector v. We can do this by multiplying each component of v by the corresponding unit vector. In other words:

v = (-5)i + (6)j

To know more about vector here

https://brainly.com/question/29740341

#SPJ4

2) You select one card from a deck of cards, and do NOT place that card back in the deck. Then, you select a second card from the deck of cards. Determine if the following two events are independent or dependent:
Selecting a queen and then selecting a king.

Answers

The two events, selecting a queen and then selecting a king, are dependent events.

When the first card is drawn and not replaced, the number of cards in the deck decreases by one. This means that the probability of drawing a king on the second draw depends on whether or not a queen was drawn on the first draw.

If a queen was drawn on the first draw and not replaced, then there are fewer cards in the deck and the probability of drawing a king on the second draw decreases.

On the other hand, if a queen was not drawn on the first draw and not replaced, then there are more cards in the deck and the probability of drawing a king on the second draw increases.

Therefore, the probability of drawing a king on the second draw is dependent on whether or not a queen was drawn on the first draw. Hence, the two events, selecting a queen and then selecting a king, are dependent events.

To learn more about deck of cards click on,

https://brainly.com/question/19526171

#SPJ4

Find the maximum and minimum values achieved by f(x) =x3 − 9x2 + 15x + 18 on the interval [0,6]

Answers

The maximum value achieved by f(x) on the interval [0,6] is 21, which occurs at x=3. The minimum value is -12, which occurs at x=0 and x=6.

To find these values, we take the derivative of f(x), set it equal to zero, and solve for x. We then plug in the values of x and evaluate f(x) to find the corresponding maximum and minimum values.

Since the derivative is positive to the left of x=3 and negative to the right, we know that we have a maximum value at x=3.

Similarly, since the derivative is negative to the left of x=0 and positive to the right of x=6, we know that we have minimum values at x=0 and x=6. The graph of f(x) also confirms these results.

To know more about derivative click on below link:

https://brainly.com/question/25324584#

#SPJ11

Suppose a graduate student does a survey of undergraduate study habits on his university campus. He collects data on students who are in different years in college by asking them how many hours of course work they do for each class in a typical week. A sample of four students provides the following data on year in college and hours of course work per class:Student Year in College Course Work Hours per Class1 Freshman (1) 72 Sophomore (2) 53 Junior (3) 44 Senior (4) 4A scatter plot of the sample data is shown here (blue circle symbols). The line Y = –2X + 9 is shown inorange.

Answers

Graduate student conducts survey about study habits, and scatter plot represents data point of one student and orange line represents linear relationship between 2 variables.

In this scenario, the graduate student is conducting a survey on undergraduate study habits by collecting data on students from different years in college. The data collected is a sample of four students, which may not represent the entire population of undergraduate students on campus.

The graduate student collects data by asking the students how many hours of course work they do for each class in a typical week. This data is then used to create a scatter plot, which shows the relationship between the year in college and hours of course work per class.

In the scatter plot, each blue circle represents one student's data point, and the orange line represents the linear relationship between the two variables. The equation for the orange line is Y = –2X + 9, where Y represents the hours of course work per class and X represents the year in college.

It is important to note that the accuracy of the survey results depends on the representativeness of the sample collected. A larger sample size and a more diverse sample may provide more accurate results in survey.

Learn more about survey here:

https://brainly.com/question/30692328


#SPJ11

Given one solution, find another solution of the differential equation: x?y" + 3xy' - 8y = 0, y = x?

Answers

Another solution to the given differential equation x²y" + 3xy' - 8y = 0, with y = x as one solution, is y = x³.

We are given a homogeneous, linear, second-order differential equation: x²y" + 3xy' - 8y = 0. One solution is y = x. To find another solution, we will use the method of reduction of order. Assume the second solution is in the form y = vx, where v is a function of x.

1. Compute y' = v'x + v.
2. Compute y" = v''x² + 2v'x.
3. Substitute y, y', and y" into the differential equation: x²(v''x² + 2v'x) + 3x(v'x + v) - 8(vx) = 0.
4. Simplify the equation: x(v''x² + 2v'x) + 3(v'x + v²) - 8v = 0.
5. Factor out x: v''x² + 2v'x + 3v'x + 3v² - 8v = 0.
6. Solve for v: v''x² + 5v'x + 3v² - 8v = 0, v = x².
7. Calculate the second solution: y = vx = x(x²) = x³.

To know more about differential equation  click on below link:

https://brainly.com/question/31583235#

#SPJ11

Two continuous random variables X and Y have a joint probability density function (PDF) fxy(x,y) = ce ** determine the marginal PDF of X, fx(x)? ,0

Answers

The marginal PDF of X is:

fx(x) = 0 for all x

Now, For the marginal PDF of X, we need to integrate the joint PDF fxy (x,y) over all possible values of y.

This will leave us with a function in terms of x only, which is the marginal PDF of X.

So, the integral we need to evaluate is:

fx(x) = ∫ (- ∞, ∞) fxy(x,y) dy

Using the given joint PDF:

fxy(x,y) = [tex]ce^{x+ y}[/tex]

We can substitute it in the above integral:

fx(x) =  ∫ (- ∞, ∞) ce^(x+y) dy

Now, we can solve this integral:

fx(x) = c  eˣ  ∫ (- ∞, ∞) e^y dy

The integral from -inf to inf of e^y dy is just the constant 1, since this is the area under the curve of the exponential function, which is equal to 1.

fx(x) = c eˣ

Since the PDF must integrate to 1, we know that:

integral from -inf to inf of fx(x) dx = 1

Using the above equation, we can solve for the constant c:

∫ (- ∞, ∞) c  eˣ dx = 1

c  ∫ (- ∞, ∞) eˣ dx = 1

c  [eˣ]  (- ∞, ∞) = 1

c * (e^inf - e^-inf) = 1

c * (inf + inf) = 1

c * inf = 1

c = 1 / inf

c = 0

Therefore, the marginal PDF of X is:

fx(x) = 0 for all x

Learn more about the mathematical expression visit:

brainly.com/question/1859113

#SPJ1

0.2 Non Textbook Exercises 1. It seems to you that fewer than half of people who are registered voters in the City of Madison do in fact vote when there is an election that is not for the president. You would like to know if this is true. You take an SRS of 200 registered voters in the City of Madison, and discover that 122 of them voted in the last non-presidential election. (a) How might a simple random sample have been gathered? (b) Construct an 80% CI to estimate the true proportion of registered voters in the City of Madison who vote in non-presidential elections. (c) Interpret the interval you created in part (b). (d) Based on your CI, does it seem that fewer than half of registered voters in the City of Madison vote in non-presidential elections? Explain.

Answers

(a) By giving each registered voter in the city a special number, and then choosing 200 numbers at random from the list, a straightforward random sample of registered voters in the City of Madison might have been obtained.

(b) Based on the available data, the true percentage of registered voters in the City of Madison who cast ballots in non-presidential elections has an 80% confidence interval of (0.533, 0.687).

(c) The interval means that approximately 80% of the calculated 80% confidence intervals for the proportion of voters who participate in non-presidential elections would contain the actual proportion of voters who participate in non-presidential elections if we were to take numerous random samples of 200 registered voters from the City of Madison.

(d) We cannot conclude that fewer than half of registered voters in the City of Madison vote in non-presidential elections, as the lower bound of the confidence interval is 0.533 which is greater than 0.5.

(a) A simple random sample of registered voters in the City of Madison could have been gathered by assigning each registered voter in the city a unique number, and then using a random number generator to select 200 numbers from the list.

(b) To construct an 80% confidence interval for the true proportion of registered voters in the City of Madison who vote in non-presidential elections, we can use the following formula:

[tex]CI = \hat{p} +/- z*(\sqrt{(\hat{p}(1-\hat{p})/n)} )[/tex]

where [tex]\hat{p}[/tex]  is the sample proportion (122/200 = 0.61),

z is the critical value from the standard normal distribution corresponding to an 80% confidence level (z = 1.28), and n is the sample size (200).

Plugging in the values, we get:

[tex]CI = 0.61 +/- 1.28* \sqrt{((0.61*(1-0.61)/200))}[/tex]

CI = 0.61 ± 0.077

Therefore, the 80% confidence interval for the true proportion of registered voters in the City of Madison who vote in non-presidential elections is (0.533, 0.687).

(c) We can interpret this interval as follows: If we were to take many random samples of 200 registered voters from the City of Madison and calculate a 80% confidence interval for the proportion of voters who vote in non-presidential elections, about 80% of these intervals would contain the true proportion of voters who vote in non-presidential elections.

(d) Since the lower bound of the confidence interval is 0.533, which is greater than 0.5, we cannot conclude that fewer than half of registered voters in the City of Madison vote in non-presidential elections.

However, we can say with 80% confidence that the true proportion of voters who vote in non-presidential elections is somewhere between 0.533 and 0.687.

For similar question on confidence interval.

https://brainly.com/question/16974109

#SPJ11

Shareese has a credit line of $3,000 on her credit. Review the summary of her latest credit card statement

Answers

The available credit on Shareese's credit card is $$1432.75.

What is the available credit on Shareese's credit card?

To find the available credit on Shareese's credit card, we need to subtract her new balance from her credit line.

Shareese's credit line is $3,000 and her new balance is $1,567.25. Therefore, the available credit on her card is:

= $3,000 - $1,567.25

= $1,432.75

Therefore, the available credit on Shareese's credit card is $2,000.

Read more about credit card

brainly.com/question/26857829

#SPJ1

Evaluate the integral: S-2 -5 (-x³ - 10x² - 32x - 36)dx

Answers

Integral ≈ 904

Let's evaluate the integral of the given function:

∫[-5(-x³ - 10x² - 32x - 36)]dx from -2 to 2 First, we can distribute the -5 to each term inside the parentheses: ∫(5x³ + 50x² + 160x + 180)dx

Now, let's find the antiderivative of the function: Antiderivative: (5/4)x^4 + (50/3)x³ + 80x² + 180x + C

Now, we'll evaluate the antiderivative at the limits of integration, 2 and -2:

F(2) = (5/4)(2^4) + (50/3)(2^3) + 80(2^2) + 180(2) F(-2) = (5/4)(-2^4) + (50/3)(-2^3) + 80(-2^2) + 180(-2)

Now, subtract F(-2) from F(2) to get the integral value: Integral = F(2) - F(-2) Perform the arithmetic operations to get the final answer: Integral ≈ 904

Learn more about integral,

https://brainly.com/question/30094386

#SPJ11

The proof of Euler's formula for ea+bi depends on knowing the Taylor expansions of at least three famous functions.
a. true b. false

Answers

The answer is A: true

The time between failures of our video streaming service follows an exponential distribution with a mean of 20 days. Our servers have been running for 15 days, What is the probability that they will run for at least 55 days? (clarification: run for at least another 40 days given that they have been running 15 days). Report your answer to 3 decimal places.

Answers

The time between failures of our video streaming service follows an exponential distribution with a mean of 20 days. Our servers have been running for 15 days. The probability that the servers will run for at least another 40 days, given that they have been running for 15 days, is approximately 0.135, or 13.5% when reported to 3 decimal places.

Given that the time between failures of your video streaming service follows an exponential distribution with a mean of 20 days, we can find the probability that the servers will run for at least 55 days, given that they have been running for 15 days already.
Step 1: Identify the parameters.
The mean of the exponential distribution is 20 days. This means that the rate parameter (λ) is the reciprocal of the mean:
λ = 1/20
Step 2: Calculate the remaining time until the desired target (55 days).
Since the servers have been running for 15 days, we want to find the probability that they will run for at least another 40 days (55 - 15).
Step 3: Use the exponential distribution probability formula.
The probability density function (pdf) of an exponential distribution is given by:
P(x) = λ * [tex]e^{(-λx)}[/tex]
However, we want to find the probability of the servers running for at least another 40 days, so we need the complementary cumulative distribution function (1 - CDF), which is:
P(X ≥ x) = [tex]e^{(-λx)}[/tex]
Step 4: Plug in the values and solve for the probability.
P(X ≥ 40) = [tex]e^{(-λ * 40)}[/tex] = [tex]e^{(-1/20 * 40)}[/tex]
P(X ≥ 40) ≈ [tex]e^{(-2)}[/tex] ≈ 0.135
The probability that the servers will run for at least another 40 days, given that they have been running for 15 days, is approximately 0.135, or 13.5% when reported to 3 decimal places.

To leran more about probability, refer:-

https://brainly.com/question/30034780

#SPJ11

In the screenshot need help with this can't find any calculator for it so yea need help.

Answers

The length of side "r" in the triangle PQR is 70.75 m.

What is triangle?

A triangle is a three-sided polygon, a basic shape in geometry. It is formed when three straight lines intersect at three points, creating interior angles that add up to 180 degrees. Triangles can be classified according to their sides, angles, and type, such as right-angled, equilateral, and isosceles. Triangles are often used in construction to form roofs, beams, and walls. They are also used in geometry and trigonometry to calculate distances, angles, and areas.

To calculate the length of "r" in a non-right-angled triangle, the Sine Rule can be used. The Sine Rule states that, for any triangle, the ratio of the length of a side to the sine of the opposite angle is the same for all sides.

In the triangle PQR, side "r" is the side opposite angleR. The sine of angleR is 0.53. Therefore, the ratio of the length of "r" to the sine of angleR is:

r/sin R = 37.5/0.53

r = 37.5/0.53 = 70.75 m.

Therefore, the length of side "r" in the triangle PQR is 70.75 m.

To know more about Triangle click-
http://brainly.com/question/22062407
#SPJ1

4. (12 points) The product manager for a brand of all-natural herbal shampoo has compiled 15 weeks of data on the weekly sales of the brand (in units), the level of media advertising (in thousands of dollars), the price (in dollars), and the use of displays (in number of stores with the brand on an end-aisle display). She then carried out a multiple regression analysis on these data in order to calculate a price elasticity. Her data and the results of the regression analysis can be seen below.(a) Name each of the variables that were used in this multiple regression analysis. For each of these variables, indicate whether it was an independent variable or a dependent variable in this regression analysis.

Answers

The variables used in this multiple regression analysis are:
- Weekly sales of the brand (dependent variable)
- Media advertising (in thousands of dollars) (independent variable)
- Price (in dollars) (independent variable)
- Use of displays (in number of stores with the brand on an end-aisle display) (independent variable)

In the multiple regression analysis mentioned in the question, the product manager of the all-natural herbal shampoo brand used the following variables:

1. Weekly sales of the brand (in units) - This is the dependent variable, as it depends on the other factors mentioned below.

2. Level of media advertising (in thousands of dollars) - This is an independent variable, as it is one of the factors affecting the weekly sales.

3. Price (in dollars) - This is also an independent variable, as it influences the weekly sales of the brand.

4. Use of displays (in number of stores with the brand on an end-aisle display) - Lastly, this is another independent variable, as the presence of the product on end-aisle displays can impact the weekly sales.

So, the dependent variable is weekly sales, and the independent variables are the level of media advertising, price, and use of displays.

Visit here to learn more about Variables:

brainly.com/question/28248724

#SPJ11

Suppose X is a uniform random variable over the interval [20, 90]. Find the probability that a randomly selected observation is between 23 and 85.

Answers

The probability that a randomly selected observation is between 23 and 85 is 31/35 or approximately 0.886.

To find the probability that a randomly selected observation is between 23 and 85, we need to calculate the area under the probability density function (PDF) between 23 and 85.

Since X is a uniform random variable, the PDF is a horizontal line with height 1/(90-20) = 1/70 over the interval [20, 90].

The area under the PDF between 23 and 85 is the area of a rectangle with width 85-23 = 62 and height 1/70, which is (62)(1/70) = 31/35.

Therefore, the probability that a randomly selected observation is between 23 and 85 is 31/35 or approximately 0.886.

To learn more about probability here:

brainly.com/question/30034780#

#SPJ11

A fat metal plate is mounted on a coordinate plane. The temperaturo of the plato, In degrees Fahrenheit, at point (x,y) is given by 2x2 + 2y =12x+8y. Find the minimum temperature and where it occurs. Is there a maximum temperature? Determine the minimum temperature and its location Select the correct choice below and ful in any answer boxes within your choice. O A The minimum temperature is 1°F at (x,y)= (Simplify your answers.) B. There is no minimum temperature

Answers

The minimum temperature is -26°F, and it occurs at the point

(x, y) = (3, 1).

We have,

To find the minimum temperature and its location, we need to minimize the given temperature function.

The temperature function is 2x² + 2y = 12x + 8y.

To minimize this function, we can take partial derivatives with respect to x and y and set them equal to zero.

∂T/∂x = 4x - 12 = 0

∂T/∂y = 2 - 8 = 0

Solving these equations, we get x = 3 and y = 1.

Substituting these values back into the temperature function, we can find the minimum temperature:

T_min = 2(3)² + 2(1) - 12(3) - 8(1)

= 18 - 36 - 8

= -26°F

Regarding the maximum temperature, since we found the minimum temperature to be -26°F, there is no maximum temperature as the temperature function does not have an upper bound.

Therefore,

The minimum temperature is -26°F, and it occurs at the point

(x, y) = (3, 1).

Learn more about functions here:

https://brainly.com/question/28533782

#SPJ12

In a sequence which begins 25, 23, 21, 19, 17,..., what is the term number for the term with a value of -11? A. n = -17 B. n = 1.5 C. n = 17 D. n = 19

Answers

19 is correct because 12+7 is 1

A psychologist has developed a personality test on which scores can range from 0 to 200. The mean score of well-adjusted people is 100. It is assumed that the less well-adjusted an individual is, the more the individual's score will differ from the mean value. The Dean of Students at XYZ University is interested in discovering whether the students at XYZ are well- adjusted, on average. Fifteen students are randomly sampled. Their scores are: 80, 60, 120, 140, 200, 70, 30, 180, 70, 150, 20, 50, 170, 90, 130.
(a). Conduct all necessary steps to perform a test of the psychologist's hypothesis using an alpha = .01.
(b). Compute the effect size d and interpret the size of this effect.

(c). Finally, use the power curve chart found in the Section 3 Module of Canvas to estimate the power of this hypothesis test. Based on our discussions in lecture, does this team appear to have sufficient statistical power?

Answers

There is not sufficient evidence to support the claim that the mean score of students at XYZ is significantly different from 100.

The effect size is small, which means that the difference between the sample mean, and the population mean is not very large relative to the variability within the sample.

Test may not have sufficient statistical power to detect a meaningful difference in mean scores between the population and the sample.

We want to test the hypothesis that the mean score of students at XYZ is not significantly different from 100, at a significance level of 0.01.

Let's start by calculating the sample mean and sample standard deviation:

[tex]Sample mean (\bar x) = (80+60+120+140+200+70+30+180+70+150+20+50+170+90+130)/15 = 105.33[/tex]

Sample standard deviation (s) = 52.411

The test statistic for a two-tailed t-test with n-1 degrees of freedom is:

[tex]t = (\bar x - \mu ) / (s / \sqrt n)[/tex]

where μ is the hypothesized population mean.

Plugging in the values, we get:

[tex]t = (105.33 - 100) / (52.411 / \sqrt 15) = 1.208[/tex]

The critical t-value for a two-tailed test with 14 degrees of freedom and α =[tex]0.01 is \±2.977.[/tex]

Since our calculated t-value (1.208) falls within the acceptance region (between -2.977 and 2.977), we fail to reject the null hypothesis.

To compute the effect size, we can use Cohen's d:

[tex]d = (\bar x - \mu) / s[/tex]

where μ is the population mean and s is the sample standard deviation.

Plugging in the values, we get:

[tex]d = (105.33 - 100) / 52.411 = 0.104[/tex]

To estimate the power of the hypothesis test, we need to know the effect size, sample size, and significance level.

We have already calculated the effect size (d = 0.104), and the significance level is [tex]\alpha = 0.01.[/tex]

Assuming a sample size of n = 15, we can use the power curve chart to find the power of the test.

The chart shows that for a two-tailed t-test with n = 15 and α = 0.01, the power is approximately 0.26 when the effect size is 0.104.

Based on the power curve chart, the power of the test is relatively low (0.26), which means that there is a high probability of a Type II error (failing to reject the null hypothesis when it is actually false).

For similar questions on Sufficient

https://brainly.com/question/29286181

#SPJ11

A voting method satisfies the top condition provided a candidate can never be among the winners unless it is ranked first by at least one voter. Select all the voting methods that satisfy the top condition Borda Coombs Ranked Choice Plurality with Runoff

Answers

The question is asking about which voting methods satisfy the top condition, where a candidate can never be among the winners unless ranked first by at least one voter. The voting methods mentioned are Borda, Coombs, Ranked Choice, and Plurality with Runoff.
The voting methods that satisfy the top condition are Coombs, Ranked Choice, and Plurality with Runoff.


what is coombs?


1. Coombs: This method eliminates the candidate with the most last-place votes in each round until a candidate has a majority of first-place votes, thus satisfying the top condition.
2. Ranked Choice:

Also known as Instant Runoff Voting, this method eliminates the candidate with the fewest first-place votes in each round and redistributes their votes until a candidate has a majority, meeting the top condition.


3. Plurality with Runoff:

In this method, if no candidate has a majority of first-place votes, a runoff is held between the top two candidates. Since only first-place votes are considered, the top condition is satisfied.

However, Borda does not satisfy the top condition, as it assigns points based on rank, and a candidate can win without being ranked first by any voter.

To know more about voting methods:

https://brainly.com/question/29552704

#SPJ11

1. Determine whether the following series is convergent ordivergent:[infinity]Xk=1sin2(k)πk+ 1

Answers

The series [infinity]Xk=1sin2(k)πk+ 1 either diverges (by the divergence test) or converges (by the alternating series test), depending on which test we choose to use.

To determine whether the series [infinity]Xk=1sin2(k)πk+ 1 is convergent or divergent, we can use the divergence test or the alternating series test.

Using the divergence test, we can see that lim(k→∞) sin2(k)πk+ 1 does not approach zero, since sin2(k) oscillates between 0 and 1 as k increases without bound. Therefore, the series diverges.

Alternatively, we can use the alternating series test by considering the sequence {an}, where an = sin2(k)πk+ 1. This sequence is alternating, since sin2(k) oscillates between 0 and 1, and it approaches zero as k increases without bound. Additionally, the sequence is decreasing, since sin2(k) decreases as k increases. Therefore, by the alternating series test, the series converges.

Know more about divergence test here:

https://brainly.com/question/30098029

#SPJ11

Use the derivative to find the vertex of the parabola. y= - x² + 6x + 1 Let f(x) = y. Find the derivative of f(x). f'(x) = The vertex is 0 (Type an ordered pair.)

Answers

The vertex of the parabola y = -x² + 6x + 1 is (3, 10).

To find the vertex of the parabola y = -x² + 6x + 1, we first need to find the derivative of the function. The derivative of a function is another function that describes the rate of change of the original function at each point. In this case, we will find the derivative of y with respect to x, denoted by f'(x).

To find the derivative of y, we can use the power rule of differentiation, which states that the derivative of xⁿ with respect to x is nxⁿ⁻¹. Using this rule, we can find the derivative of y = -x² + 6x + 1 as follows:

f'(x) = -2x + 6

Now that we have the derivative, we can find the x-coordinate of the vertex by setting f'(x) = 0 and solving for x:

-2x + 6 = 0

2x = 6

x = 3

Therefore, the x-coordinate of the vertex is x = 3. To find the y-coordinate, we can substitute x = 3 into the original equation of the parabola:

y = -x² + 6x + 1

y = -(3)² + 6(3) + 1

y = -9 + 18 + 1

y = 10

To know more about derivative here

https://brainly.com/question/30074964

#SPJ4

Given the confidence interval (0.51, 0.68), determine the value of E. a. 1.190 O b. 0.085 O c. 0.170 O d. 0.595

Answers

The confidence interval (0.51, 0.68), determine, the value of E is 0.085, which is option (b).

The value of E, also known as the margin of error, can be determined using the formula:

E = (upper bound of CI - lower bound of CI) / 2

In this case, the upper bound of the confidence interval is 0.68 and the lower bound is 0.51, so:

E = (0.68 - 0.51) / 2 = 0.085

The margin of error is a measure of the precision of an estimate, and it indicates the amount by which the estimate may differ from the true population value. The smaller the margin of error, the more precise the estimate. The margin of error is affected by the sample size and the level of confidence. A larger sample size and a higher level of confidence will result in a smaller margin of error.

It's important to note that the margin of error only provides a range of plausible values for the true population parameter, and it doesn't guarantee that the true value falls within that range. Therefore, it's always important to interpret the results of a study or survey with caution and consider other factors that may impact the accuracy of the estimate.

Learn more about interval here:

https://brainly.com/question/13708942

#SPJ4

10. The isosceles trapezoid below is composed of three congruent equilateral triangles with side lengths of 6 cm. find the area and perimeter of the trapezoid.

Answers

The area and perimeter of the isosceles trapezoid are 83.04cm² and 20.76cm

What Is an isosceles trapezoid?

An isosceles trapezoid is a convex quadrilateral with a line of symmetry bisecting one pair of opposite sides.

A trapezoid is a quadrilateral with two unequal parallel lines.

To find the base of one triangle;

Tan 60 = 6/x

1.732 = 6/x

x = 6/1.732

x = 3.46

sin60 = 6/hyp

hyp = 6/0.866

hyp = 6.93

the base = 2x = 2× 3.46 = 6.92cm

Therefore , the top parallel line = 6.92

and the base of the trapezoid = 3× 6.92 = 20.76cm

The perimeter = 6.93+6.93+6.92+20.76

= 41.54cm

Area = 1/2(a+b)h

= 1/2( 6.92+20.76)6

= 27.68×3

= 83.04cm²

learn more about Isosceles trapezoid from

https://brainly.com/question/10644521

#SPJ1

Who called King George III "the Royal Brute of Great Britain."?

Answers

The American founding father and litterateur Thomas Paine referred to as King George III" the Royal Brute of high-quality Britain."

Paine was a main figure within the American Revolution and was a fierce advocate of american independence from British rule. He wrote a series of influential pamphlets, which includes" Common feel" and" The Rights of man," which helped to excite assist for the progressive reason.

In his thoughts, Paine often blamed the British monarchy and its leaders, including King George III, whom he saw as a dictator and an oppressor. His slicing phrases helped to rally reinforcement for the purpose of America self-reliance and performed a significant element in shaping the path of history.

Learn more about Thomas Paine:-

https://brainly.com/question/20520322

#SPJ4

Other Questions
Probability of Type 1 0.5 Points For a particular type of hypothesis test with a sample size of 120, a=0.05 and B=0.68. Find the probability of a Type I error. Write your answer as a decimal value with a leading zero. (Don't put any text or supporting work! Just the numeric value.) loss of what w/in the cell promotes metastasis and where are they located? Pam collected 7 1/2 bins of glass bottles to recycle. Shelby collected 5 1/8 times as many bins as Pam. How many bins of bottles did Shelby collect? the ____ ______ ventilation technique is not recommended for a lone rescuer during CPR Which is an advantage of promoting a matte to 3D Warp? why does coarctation of the aorta present with rib notching? What if the sample size is too small and thus the success-failure condition is not met? Put one pair of brackets into each calculation to make it correct a. 67-5 +4= 16b. -2+2412-4=2 Explain how a Web Server would use threads to improve performance. true or false: grouping two or more products together and pricing them as a unit is called stacking. Most common cause complication that develops in first few hours of life in infant with DM mother? A ____ job is one that is found in many organizations and performed by several individuals who have similar duties and require similar KSAs.red-circledbenchmark True/False...The effective nuclear charge in an atom is proportional to the number of nuclear protons. Use Newton's method to approximate a root of the equation z + +2 = 0 as follows. Let i = - 1 be the initial approximation. The second approximation x2 is__________ and the third approximation x3 is___________ what aspects of the recruiting process increase the likelihood that territory managers will leave once they have been hired? Your team members are working on their tasks to assemble various products. A key supplier informs you that the shipment of parts you need will be delayed for two weeks. You check the risk register and no response plan for this situation has been documented. What should you do FIRST?a. Switch to vendors that have the parts you need.b. Get together with the project sponsor and ask for advice.c. Evaluate the impact and brainstorm options with team members.d. Contact the customer to apprise them of the situation. What is an Intent? Can it be used to provide data to a ContentProvider? Why or why not? Henry buys only chips and candy and spends all of his income on the two items. Suppose the price of chips rises. Henry adjusts his optimal consumption bundle such that he now buys less chips and less candy at his new consumer equilibrium. Which of the following statements must be true? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a the income effect must have been bigger than the substitution effect since we observe Henry buying less chips. b the income effect must have been bigger than the substitution effect since we observe Henry buying less candy. c the substitution effect must have been bigger than the income effect since we observe Henry buying less candy. d the substitution effect must have been bigger than the income effect since we observe Henry buying less chips. Can I leave blank lines in nurses' notes? Why or why not? The Displaced Person QuestionsExplain how the Shortleys were displaced persons. Explain how Mrs. McIntyre is a displaced person. Explain what the desk symbolizes about the Judge.What are your thoughts about the following quote? What is it saying between the lines? Do you think Mrs. McIntyre is right? Is she equal to anything?: Theyre all the same, she (Mrs. McIntyre) muttered, whether they come from Poland or Tennessee. Ive handled Herrins and Ringfields and Shortleys and I can handle a Guizac, and she narrowed her gaze until it closed entirely around the diminishing figure on the tractor as if she were watching him through a gunsight. All her life she had been fighting the worlds overflow and now she had it in the form of a Pole. Youre just like all the rest of them, she said, --only smart and thrifty and energetic but so am I. And this is my place, and she stood there, a small, black-hatted, black-smocked figure with an aging cherubic face, and folded her arms as if she were equal to anything. (p.224)