With alpha set at .05, the Critical Region for a two-tailed test would begin at $\pm$ 1.96. In a one-tailed test at the same alpha level the Critical Region would begin at
A) $\pm$1.96
B) $\pm$ 2.58
C) $\pm$ 2.30
D) + or - 1.65

Question

Quizplus · Accepted Answer

In a one-tailed test with alpha set at .05, the critical value is 1.65, not 1.96, because the entire alpha is in one tail.

With Alpha Set at ±\pm± 196 in a One-Tailed Test at the Same Alpha Level

With Alpha Set at $\pm$ 196 in a One-Tailed Test at the Same Alpha Level