Chapter 8 - Hypothesis Testing - 8-2 z Test for a Mean - Exercises 8-2 - Page 436: 15

a. P-Value = 0.258, α = 0.05 , one-tailed test Since α < P value, we do not reject the null hypothesis. b. P-Value = 0.0684, α = 0.10/2 =0.05 , two-tailed test Since α< P value, we do not reject the null hypothesis. c. P-Value = 0.0153, α = 0.01 , one-tailed test Since α < P value, we do not reject the null hypothesis. d. P-Value = 0.0232, α = 0.05/2 = 0.025, two-tailed test Since α > P value, we reject the null hypothesis. e. P-Value = 0.002, α = 0.01 , one-tailed test Since α >P value, we reject the null hypothesis.