Suppose you conduct a t-test for the null hypothesis H0: m = 1,500 versus the alternative hypothesis Ha: m 7 1,500, based on a sample of 17 observations. The test results are t = 1.89, p@value = .038.

a. What assumptions are necessary for the validity of this procedure?

b. Interpret the results of the test.

c. Suppose the alternative hypothesis had been the twotailed Ha: m  1,500. If the t-statistic were unchanged, what would the p-value be for this test? Interpret the p-value for the two-tailed test.