A one-tailed sign test is used to test for differences between two populations at the 0.10 level of significance. There were nine pluses and five minuses. 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 compares the number of pluses to the number of minuses. With 9 pluses and 5 minuses, the test statistic is not extreme enough to reject the null hypothesis at the 0.10 significance level.

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