a. Given the following hypotheses, determine the p-value when ?x = 21, n = 25, and ? = 5. H0: ? = 20 H1: ? / 20 b. Repeat part a with ?x = 22. c. Describe what happens to the value of the test statistic and its p-value when the value of ?x increases. Solution The test statistic becomes larger and the p-value becomes smaller..