(b) Find the cntical value(s) and identity the rejection region(s). The critical value(s) is/are. (Round two decimal places as needed. Use a comma to separate answers as needed.) What is/are the rejection region(s)? Select the correct choice below and fill in the answer box(es) within your choice. (Round two decimal places as needed.) O A. z< z> O B. z< OC. z> (c) Find the standardized test statistic z for u1 -42. z= (Round to two decimal places as needed.)
(b) Find the cntical value(s) and identity the rejection region(s). The critical value(s) is/are. (Round two decimal places as needed. Use a comma to separate answers as needed.) What is/are the rejection region(s)? Select the correct choice below and fill in the answer box(es) within your choice. (Round two decimal places as needed.) O A. z< z> O B. z< OC. z> (c) Find the standardized test statistic z for u1 -42. z= (Round to two decimal places as needed.)
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:You want to buy a washing machine, and a salesperson tells you that the mean repair costs for Model A and ModelB are equal. You research the repair costs. The mean repair cost of 27 Model A washing machines is $212. Assume the
population standard deviation is $15. The mean repair cost of 23 ModelB washing machines is $228. Assume the population standard deviation is $22. At a = 0.01, can you reject the salesperson's claim? Assume the samples are random and
independent, and the populations are normally distributed. Complete parts (a) through (e).
...
(b) Find the critical value(s) and identify the rejection region(s).
The critical value(s) is/are
(Round to two decimal places as needed. Use a comma to separate answers as needed.)
What is/are the rejection region(s)? Select the correct choice below and fill in the answer box(es) within your choice.
(Round to two decimal places as needed.)
O A. z<
В. Z<
С. z>
(c) Find the standardized test statistic z for µj - P2.
(Round to two decimal places as needed.)
(d) Decide whether to reject or fail to reject the null hypothesis. Choose the correct answer below.
O A. Fail to reject Ho. The standardized test statistic is not in a rejection region.
B. Fail to reject Ho. The standardized test statistic is in a rejection region.
C. Reject Ho. The standardized test statistic is in a rejection region.
O D. Reject Ho. The standardized test statistic is not in a rejection region.
(e) Interpret the decision in the context of the original claim.
At the
% significance level, there is
evidence to
the claim that the mean repair costs for Model A are
the mean repair costs for Model B.
Transcribed Image Text:You want to buy a washing machine, and a salesperson tells you that the mean repair costs for Model A and Model B are equal. You research the repair costs. The mean repair cost of 27 Model A washing machines is $212. Assume the
population standard deviation is $15. The mean repair cost of 23 ModelB washing machines is $228. Assume the population standard deviation is $22. At a = 0.01, can you reject the salesperson's claim? Assume the samples are random and
independent, and the populations are normally distributed. Complete parts (a) through (e).
(a) Identify the claim and state H, and Ha.
What is the claim?
A. The mean repair costs for Model A and Model B are equal.
B. The mean repair costs for Model A and Model B are different.
C. The mean repair cost for Model A is greater than Model B.
D. The mean repair cost for Model A is less than Model B.
Let
be the mean repair cost for Model A and let µ, be the mean repair cost for Model B. What are Ho and H,?
A. Ho: H1 = H2
B. Ho: H12 H2
Ha: H1 <H2
O C. Ho: H1 < H2
Ha: H12 H2
Hai H1 # H2
O D. Ho: H1 > H2
Ha: H1 SH2
O E. Ho: H1 SH2
Ha: H1 > H2
O F. Ho: H1 # H2
Ha: H1 = H2
(b) Find the critical value(s) and identify the rejection region(s).
The critical value(s) is/are
(Round to two decimal places as needed. Use a comma to separate answers as needed.)
What is/are the rejection region(s)? Select the correct choice below and fill in the answer box(es) within your choice.
(Round to two decimal places as needed.)
O A. z<
z>
O B. z<
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