Answer to Question #345467 in Statistics and Probability for Danica

Question

1.One-tailed test;variance is known,a=0.05,n=35

Answer 1

The critical value for $\alpha = 0.05$ right-tailed one-tailed test is 

$$z=1.6449$$

The critical value for $\alpha = 0.05$ left-tailed one-tailed test is 

$$z=-1.6449$$