Recall that "very satisfied" customers give the XYZ-Box video game system a rating that is at least 42. Suppose that the
Posted: Mon Nov 15, 2021 12:24 pm
(b) The random sample of 62 satisfaction ratings yields a sample mean of = 42.990. Assuming that o equals 2.69, use critical values to test Hy versus Ha at each of a = 10,05, 01, and 001. (Round your answer 2.05 to 3 decimal places and other z-scores to 2 decimal places.) za 2.90 Rejection Points 2.10 2.05 2.01 z. 001
Reject Ho with a = , but not with a = (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 reject HO at those levels of a but not with a =
(d) How much evidence is there that the mean composite satisfaction rating exceeds 42? There is evidence.