When the necessary conditions are met, a two-tail test is being conducted to test the difference between two population means, but your statistical software provides only a one-tail area of 0.028 as part of its output. The p-value for this test will be:
A)0.972.
B)0.05.
C)0.056.
D)0.014.

Question

Quizplus · Accepted Answer

The p-value for a two-tailed test is twice the one-tail area provided by the software because you need to account for both tails of the distribution. Therefore, 0.028 * 2 = 0.056.

When the Necessary Conditions Are Met, a Two-Tail Test Is