17. 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 70 satisfaction ratings to provide evidence supporting the claim that the mean composite satisfaction rating for the XYZ-Box exceeds 42. (a) Letting / represent the mean composite satisfaction rating for the XYZ-Box, set up the null hypothesis Ho and the alternative hypothesis Ha needed if we wish to attempt to provide evidence supporting the claim that / exceeds 42. Ho: H (Click to select) | 42 versus Ha: H (Click to select) v | 42. (b) The random sample of 70 satisfaction ratings yields a sample mean of x = 42.830. Assuming that o equals 2.63, use critical values to test Ho versus Ha at each of a = .10, .05, .01, and .001. (Round your answer z.05 to 3 decimal places and other z-scores to 2 decimal places.) Z= Rejection points Z . 10 Z. 05 Z. 01 Z.001 Reject Ho with a = (Click to select) v , but not with a =(Click to select) v (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. (Round your answers to 4 decimal places.) p-value = Since p-value = is less than |(Click to select) |; reject Ho at those levels of a but not with a = (Click to select) . (d) How much evidence is there that the mean composite satisfaction rating exceeds 42? There is (Click to select) v evidence