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 Model B 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).Let u, 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 H2C. Ho: H12 H2Hai H1 H2O D. Ho: H1 + H2Hai H1 =H2Ha: H1 SH2(b) Find the critical value(s) and identify the rejection region(s).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> 2.58В.(c) Find the standardized test statistic z for u, - H2.|(Round to two decimal places as needed.)

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Description: 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 de

Solution: Given information: n1=20 Sample size of model An2=21 Sample size of model Bx1=$211 Sample mean of model Ax2=$222 Sample mean of model Bσ1=$20 Poplation standard deviations of model Aσ2=$25 Poplation standard deviations of model Bα=0.01 Level of significancea) The null and alternative hypothesis is Ho:μ1=μ2 VS Ha:μ1≠μ2 Option E is correct b) The z critical values at α=0.01 is Zα/2=Z0.005=2.58 From Z table and -Zα/2=-Z0.005=-2.58 From Z table The critical values are 2.58 and -2.58 The rejection region of the test is z< -2.58 or z>2.58 Option A is correct c) Test statistic z=x1-x2σ12n1+σ22n2z= 211-22220220+25221z=211-22240020+62521z=211-22220+29.761904z=211-22249.761904z=-117.0542117=-1.5593521z=-1.56 Test statistic z = -1.56

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fou 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 the population standard deviation is $20. The mean repair cost of 21 Model B 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 and ndependent, and the populations are normally distributed. Complete parts (a) through (e). Let u, be the mean repair cost for Model A and let u, be the mean repair cost for Model B. What are Ho and H,? OA. Ho: H1 2 b) Find the critical value(s) and identify the rejection region(s). The critical value(s) is/are -2.58, 2.58 . Round to two decimal places as needed. Use a comma 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.) VA. z< -2.58 , z> 2.58 O B. OC. z> c) Find the standardized test statistic z for u, "42- = (Round to two decimal places as needed.)

fou 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 the population standard deviation is $20. The mean repair cost of 21 Model B 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 and ndependent, and the populations are normally distributed. Complete parts (a) through (e). Let u, be the mean repair cost for Model A and let u, be the mean repair cost for Model B. What are Ho and H,? OA. Ho: H1 2 b) Find the critical value(s) and identify the rejection region(s). The critical value(s) is/are -2.58, 2.58 . Round to two decimal places as needed. Use a comma 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.) VA. z< -2.58 , z> 2.58 O B. OC. z> c) Find the standardized test statistic z for u, "42- = (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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