Using the sign test, if the null hypothesis is false, then P (the probability of a plus) _________.
A) equals 0.50
B) equals alpha
C) equals beta
D) is not equal to 0.50

Question

Quizplus · Accepted Answer

The sign test is a non-parametric test used to determine whether two groups are statistically different from each other. It compares the number of observations in two groups that are greater or less than a specified value. If the null hypothesis is false, then the probability of a plus (or minus) sign will be different from 0.50. This means that the number of observations in one group is significantly different from the other group. Therefore, the correct answer is D, which states that P is not equal to 0.50.

Using the Sign Test, If the Null Hypothesis Is False