Chapter 12 - Hypothesis Testing: One Population Mean 1. Use the critical value approach to test the following, at the 5% significance level. x = 30 S = 8 n = 15 Ho: J = 20 Ha: U # 20 2. Use the critical value approach to test the following, at the 5% significance level. x = 10 0 =8 n = 15 Ho: M = 20 Ha: H 20 Test statistic t = 2.1 4. Use the p-value approach to test the following hypotheses at the 5% significance level. x = 30 0 = 8 n = 20 Ho: H = 25 Ha: H > 25 5. Use the p-value approach to test the following hypotheses at the 5% significance level. b) (Summary Statistics given, perform the test) x = 5.13 S = 2.25 n = 12 Ho: H = 5.2 Ha: H