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I need help with letter C and D

MATLAB: An Introduction with Applications
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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I need help with letter C and D

Question No. 5 Recall that "very satisfied" customers give the XYZ-Box video game system a rating that is at least 42. Suppose that the manufacturer of the XYZ-Box wishes to use the random sample of 65 satisfaction ratings to provide evidence supporting the claim that the mean composite satisfaction rating for the XYZ-Box exceeds 42. A. Letting m represent the mean composite satisfaction rating for the XYZ-Box, set up the null hypothesis H0 and the alternative hypothesis Ha needed if we wish to attempt to provide evidence supporting the claim that u exceeds 42. B. The random sample of 65 satisfaction ratings yields a sample mean of 42.954. Assuming that the population standard deviation equals 2.64, use critical values to test HO versus Ha at each of a = 10, .05, .01, and .001. C. Using the information in part b, calculate the p-value and use it to test HO versus Ha at each of a = 10, .05, .01, and .001 D. How much evidence is there that the mean composite satisfaction rating exceeds 42?
Transcribed Image Text:Question No. 5 Recall that "very satisfied" customers give the XYZ-Box video game system a rating that is at least 42. Suppose that the manufacturer of the XYZ-Box wishes to use the random sample of 65 satisfaction ratings to provide evidence supporting the claim that the mean composite satisfaction rating for the XYZ-Box exceeds 42. A. Letting m represent the mean composite satisfaction rating for the XYZ-Box, set up the null hypothesis H0 and the alternative hypothesis Ha needed if we wish to attempt to provide evidence supporting the claim that u exceeds 42. B. The random sample of 65 satisfaction ratings yields a sample mean of 42.954. Assuming that the population standard deviation equals 2.64, use critical values to test HO versus Ha at each of a = 10, .05, .01, and .001. C. Using the information in part b, calculate the p-value and use it to test HO versus Ha at each of a = 10, .05, .01, and .001 D. How much evidence is there that the mean composite satisfaction rating exceeds 42?
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