If a one-sided null hypothesis is rejected at a given significance level,then the corresponding two-sided null hypothesis (i.e. ,the same sample size,the same standard deviation,and the same mean)will ______________ be rejected at the same significance level.
A)Always
B)Sometimes
C)Never

Question

Quizplus · Accepted Answer

A one-sided test is more powerful than a two-sided test at the same significance level, so rejecting a one-sided null hypothesis does not guarantee rejection of the two-sided null hypothesis.

If a One-Sided Null Hypothesis Is Rejected at a Given