At a Given Significance Level, a One-Tailed Test

Multiple Choice

At a given significance level, a one-tailed test:

A) is less likely to detect real differences between means than is a two-tailed test.
B) has a higher critical value than does a two-tailed test.
C) is less accurate than a two-tailed test.
D) is more likely to detect real differences between means than is a two-tailed test, given that the correct tail was selected for the test.