A researcher obtains z = -6.45.What is the decision for a one-tailed test,upper-tail critical,at a .05 level of significance?
A)to reject the null hypothesis
B)to retain the null hypothesis
C)It depends on the sample size.
D)There is not enough information to make a decision.

Question

Quizplus · Accepted Answer

Since the test is upper-tail critical, a negative z-score like -6.45 would not fall in the critical region for rejecting the null hypothesis. Therefore, the decision is to retain the null hypothesis.

A Researcher Obtains Z = -6