Question

In a one-tailed test, the rejection region is located under one tail (left or right) of the corresponding probability distribution, while in a two-tailed test this region is located under both tails.a.True or False.b.True.c.False.

Answer 1

Both parts A and B of the statement are True

Step-by-step explanation:

In a one-tailed test we are testing a hypothesis that includes a directional relationship, where that relationship is greater than or less than critical value located at the top/bottom 5% of the distribution. If the test statistic falls into this region, we reject the null hypothesis.

When we are doing a two-tailed tests, the hypothesis does not include a directional relationship. We are looking for a mean value that is significantly greater (2.5%) and significantly less (2.5%) than the null hypothesis.