A random sample of 50 measurements resulted in a sample mean of 62 with a sample standard deviation 8. It is claimed that the true population mean is at least 64.
(a) Is there suf?cient evidence to refute the claim at the 2% level of signi?cance?
(b) What is the p-value?
(c) What is the smallest value of α for which the claim will be rejected?