The choice between a one-tailed test and a two-tailed test
A) will affect the way $H_0$ is stated
B) should be made after learning the location of X
C) is determined by the logic of the study rather than by the outcome of the data
D) is an optional matter; some statisticians prefer (b) and some prefer (c)

Question

Quizplus · Accepted Answer

The choice between a one-tailed and a two-tailed test is determined by the research hypothesis and the direction of the effect being tested, not by the data or personal preference.

The Choice Between a One-Tailed Test and a Two-Tailed Test H0H_0H0​

The Choice Between a One-Tailed Test and a Two-Tailed Test $H_0$