The critical value(s) is/are -2.58, 2.58 .(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.)A. z 2.58B. z(c) Find the standardized test statistic z for u, - µ2.1.56 (Round to two decimal places as needed.)(d) Decide whether to reject or fail to reject the null hypothesis. Choose the correct answer below.A. Reject Ho: The standardized test statistic is in a rejection region.B. Reject Ho: The standardized test statistic is not in a rejection region.C. Fail to reject Ho. The standardized test statistic is in a rejection region.D. Fail to 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 insufficient evidence to reject the claim that the mean repair costs for Model A areequal tothe mean repair costs for Model B. 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 20 Model A washing machines is $211. Assume thepopulation standard deviation is $20. The mean repair cost of 21 ModelB washing machines is $222. Assume the population standard deviation is $25. At a = 0.01, can you reject the salesperson's claim? Assume the samples are random andindependent, 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 cost for Model A is greater than Model B.B. The mean repair costs for Model A and Model B are different.C. The mean repair cost for Model A is less than Model B.D. The mean repair costs for Model A and Model B are equal.Let µ, be the mean repair cost for Model A and let u, be the mean repair cost for Model B. What are H, and H,?A. Ho: H1 H2Ho: H12 H2Ha: H1 H2Ha: H1 SH2(b) Find the critical value(s) and identify the rejection region(s).

Name: The critical value(s) is/are -2.58, 2.58 .(Round to two decimal place
Uploaded: 2024-03-20T07:07:12.000Z
Channel: Bartleby
Description: The critical value(s) is/are -2.58, 2.58 .(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.(Roun

Question

The critical value(s) is/are -2.58, 2.58 .(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.)A. z< - 2.58 , z> 2.58B. z(c) Find the standardized test statistic z for u, - µ2.1.56 (Round to two decimal places as needed.)(d) Decide whether to reject or fail to reject the null hypothesis. Choose the correct answer below.A. Reject Ho: The standardized test statistic is in a rejection region.B. Reject Ho: The standardized test statistic is not in a rejection region.C. Fail to reject Ho. The standardized test statistic is in a rejection region.D. Fail to 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 insufficient evidence to reject the claim that the mean repair costs for Model A areequal tothe mean repair costs for Model B. 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 20 Model A washing machines is $211. Assume thepopulation standard deviation is $20. The mean repair cost of 21 ModelB washing machines is $222. Assume the population standard deviation is $25. At a = 0.01, can you reject the salesperson's claim? Assume the samples are random andindependent, 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 cost for Model A is greater than Model B.B. The mean repair costs for Model A and Model B are different.C. The mean repair cost for Model A is less than Model B.D. The mean repair costs for Model A and Model B are equal.Let µ, be the mean repair cost for Model A and let u, be the mean repair cost for Model B. What are H, and H,?A. Ho: H1 H2Ho: H12 H2Ha: H1 H2Ha: H1 SH2(b) Find the critical value(s) and identify the rejection region(s).

Accepted Answer

Given,
n1 = 20          n2=21x1=211          x2=222σ12=20            σ22=25 Level of significance =…