2. Let X1, X2, ..., X, be a random sample from an exponential distribution Exp(A). (a) Show that the mgf of X Exp(A) is Mx(t) = (1 – At)-1, (b) Let the r.v. Y = ?E, X;. Find the mgf of Y and deduce that Y ~ x(2n). 2 n (c) Derive a 100(1 – a)% CI for A. (d) A random sample of 15 heat pumps of a certain type yielded the following obser- vations on lifetime (in years): 2.0 1.3 6.0 1.9 5.1 0.4 1.0 5.3 15.7 0.7 4.8 0.9 12.2 5.3 0.6 Assume that the lifetime distribution is exponential. What is a 95% CI for the true average and the standard deviation of the lifetime distribution?

Q: I don't understand this question I need help solving it.

A: 2. Let x be the incomes are approximately normal distribution with mean $33,000 and standard…

Q: I bought a new gas lawn mower the other day. This new mower mows faster than the old electric…

A: The objective of this question is to calculate the time saved by using a new gas lawn mower compared…

Q: How do I solve this?

A: given number of people probability 1 0.25 2 0.32 3 ? 4 ? 5 0.07 6 0.03 7+ 0.01…

Q: i cannot see the solution please resend

A:

Q: I bought a new gas lawn mower the other day. This new mower mows faster than the old electric…

A: The objective of this question is to calculate the time saved by using a new gas lawn mower compared…

Q: I need more help on this

A: Given information: μ=151000σ=35000 n=77

Q: We are working in R². Let & be the standard basis, B be the basis formed by {(2, 1), (0, −1)}, and C…

A:

Q: don't know how to do this question even though I got the right answe

A: Given data: Two box plots for the salaries for Construction workers and Teachers are shown. A box…

Q: In a past election, the voter turnout was 57%. In a survey, 934 subjects were asked if they voted in…

A:

Q: In a test of the effectiveness of garlic for lowering cholesterol, 45 subjects were treated with…

A: a. The best point estimate is 5.4 mg/dL. The best point estimate for the population mean net change…

Q: That is NOT the correct solution. Thanks.

A:

Q: How do you solve this problem?

A:

Q: I attached the problem I do not understand how to do this problem. Thank you for your assistance.

A:

Q: How do I solve this ?

A: GIVEN: 6 - x - x2  if x ≤ 32x - 5         if x > 3

Q: I don't understand the writing like that. Can someone write the solution neatly? Thank you!

A:

Q: don't understand how I'm supposed to solve this question.

A: Basic concept of discrete probability distribution are used

Q: I am not sure of how to solve .  I believe I keep missing a step.

A: The given equation is y =2x^3 -5x.The values of x =-2 and delta x= 0.1.

Q: -2 -1 6 5 3 -1 -2+ 1 2 3 4 5 6

A:

Q: Hey can you show the solution in a piece of paper or some sort of visual?

A:

Q: How do I solve this ?

A:

Q: How do I solve this ?

A:

Q: I tried the solutions you did, but it still said that it's incorrect. I don't know what else I could…

A:

Q: how do i solve this?

A: Given that: The table ,

Q: solution is typed off the page

A:

Q: I'm confused about step 2 can I please get an clear answer

A: Sol:-  In this you are confused about step 2 so that i am clearing you about this.

Q: cleared

A: We have to find the digit in thousand place  of the product.

Q: How do I solve this question?

A: Topic - slope of function To find slope at a point ,take two points on the line and calculate slope…

Q: please answer part d as well. i dont see the solution anywhere here.

A: According to the given information in this question We need to answer part d

Q: how do we go about solving the last two parts?

A:

Q: (d) If the mean score was u = 157 with standard deviation o = 19, what was the final exam score for…

A:

Q: How do I solve this?

A: 1,2,3....,23,24,25 are called element of set S.  Hence, set S has 25 element which mean n(S) = 25…

Q: I bought a new gas lawn mower the other day. This new mower mows faster than the old electric…

A: The objective of this question is to calculate the time saved by using a new gas lawn mower compared…