The test of the null hypothesis is a ________ test if the alternative hypothesis is expressed directionally.
A) two-tailed
B) three-tailed
C) four-tailed
D) one-tailed
E) A and D

Question

Quizplus · Accepted Answer

If the alternative hypothesis is expressed directionally, then the test of the null hypothesis becomes a one-tailed test. This is because the hypothesis test is focused on a specific direction of effect rather than considering two possible directions.

The Test of the Null Hypothesis Is a ________ Test