12.Find the critical value for a left-tailed test with α=0.05 and n=75

A.1.65

B.-1.65

C.2.33

D.-2.33

13.Find the critical value for a two-tailed test with α=0.10 and n = 100

A.±1.65

B.±2.33

C.±1.96

D.±2.58

14.You wish to test the claim that μ>12 at a level of significance of α=0.05 and are given the sample statistics mean = 12.3, deviation = 1.2, and sample size = 50. Compute the value of the standardized test statistic.

A.3.11

B.0.98

C.1.77

D.2.31

15.Suppose you want to test the claim that μ>25.6. Given a sample size of n=42 and a level of significance of α=0.025, when should you reject the null hypothesis?

A.if the standardized test statistic is greater than 2.33

B.if the standardized test statistic is greater than 1.28

C.if the standardized test statistic is greater than 1.96

D.if the standardized test statistic is greater than 1.65