Suppose You Are Testing the Null Hypothesis That a Population $\sigma$

Multiple Choice

Suppose you are testing the null hypothesis that a population mean is less than or equal to 46,against the alternative hypothesis that the population mean is greater than 46.If the sample size is 25, $\sigma$ is known,and alpha = .01,the critical value of z is _______.

A) 1.645
B) -1.645
C) 1.28
D) -2.33
E) 2.33