Question

Recall that “very satisfied” customers give the XYZ-Box video game system a composite satisfaction rating that is at least 42.
a. Letting m represent the mean composite satisfaction rating for the XYZ-Box, set up the null and alternative hypotheses needed if we wish to attempt to provide evidence supporting the claim that m exceeds 42.
b. The mean and the standard deviation of a sample of 65 customer satisfaction ratings are 42.95 and 2.6424, respectively.
(1) Use a critical value to test the hypotheses you set up in part a by setting α equal to .01.
(2) Interpret the p- value of .0025 for the test.


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  • CreatedMay 28, 2015
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