The test of the null hypothesis is a(n)________ test if the alternative hypothesis is expressed directionally.
A)two-tailed
B)three-tailed
C)extreme-tailed
D)one-tailed
E)A and D

Question

Quizplus · Accepted Answer

One-tailed tests are used when the alternative hypothesis is expressed directionally, indicating a specific direction of difference or effect. A one-tailed test focuses on either an increase or a decrease in the population parameter being tested. In contrast, a two-tailed test is used when the alternative hypothesis is non-directional, suggesting that the parameter may differ from the null value in either direction.

The Test of the Null Hypothesis Is A(n)________ Test If