Recall that "very satisfied" customers give the XYZ-Box video game system a composite satisfaction rating that is at least 42.
a: Letting µ 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 µ exceeds 42.
The mean and the standard deviation of a sample of n = 65 customer satisfaction ratings are and s = 2.6424. Use a critical value to test the hypotheses you set up in part a by setting a equal to .01. Also, interpret the p-value of .0025 for the test.