A one-tailed test is a
A)hypothesis test in which rejection region is in both tails of the sampling distribution
B)hypothesis test in which rejection region is in one tail of the sampling distribution
C)hypothesis test in which rejection region is only in the lower tail of the sampling distribution
D)hypothesis test in which rejection region is only in the upper tail of the sampling distribution

Question

Quizplus · Accepted Answer

In a one-tailed test, the rejection region is located in only one tail of the sampling distribution, depending on the direction of the alternative hypothesis. This means that we are testing for the possibility of the sample mean being either significantly larger or significantly smaller than the hypothesized population mean, but not both. Therefore, a one-tailed test is different from a two-tailed test, where the rejection region is split between the two tails of the sampling distribution.

A One-Tailed Test Is a