A one-tailed sign test is used to test for differences between two populations at the 0.10 level of significance. There were nine plus signs and five minus signs. What is the decision regarding the null hypothesis?
A)Fail to reject the null hypothesis.
B)Reject the null hypothesis.
C)Neither reject nor fail to reject the null hypothesis.
D)Should have used a paired t-test.

Question

Quizplus · Accepted Answer

The one-tailed sign test here involves comparing the number of plus signs to the number of minus signs to determine if there is a significant difference in the directions indicated by these signs. With nine plus signs and five minus signs, and testing at the 0.10 level of significance, there isn't enough evidence to conclude a significant difference between the two populations. Therefore, we fail to reject the null hypothesis.

A One-Tailed Sign Test Is Used to Test for Differences