For any given obtained result, a one tail p-level is
A) appropriate to use no matter what the alternative hypothesis states.
B) less than the two tail p-level
C) is appropriate to use only if the alternative hypothesis is directional
D) is appropriate to use only if the null hypothesis is nondirectional
E) less than the two tail p-level and is appropriate to use only if the alternative hypothesis is directional.

Question

Quizplus · Accepted Answer

A one-tail p-level is indeed less than the two-tail p-level because it only considers the extreme outcomes in one direction of the distribution. It is appropriate to use when the alternative hypothesis specifies a direction (e.g., stating that one mean is greater than another, rather than simply not equal).

For Any Given Obtained Result, a One Tail P-Level Is