Which of the Following Statements Are Not True?
A) the Test

Which of the following statements are not true?

A) The test statistic $Z = \left( \bar { X } - \mu _ { 0 } \right) / ( \sigma / \sqrt { n } )$
Has a standard normal distribution when $H _ { o } : \mu = \mu _ { 0 }$
Is true.
B) The reliability of hypothesis testing procedure in reaching a correct decision can be assessed by studying type I error probability.
C) The process of reaching a decision by using the methodology of classical hypothesis testing involves selecting a level of significance $\alpha$
And then rejecting or not rejecting the null hypothesis $H _ { o }$
At that level $\alpha .$
D) All of the above statements are true.
E) None of the above statements are true.