Because each observation from a sample for the sign test must be assigned a plus or minus sign, this sampling distribution can be said to follow the binomial probability distribution.

Question

Quizplus · Accepted Answer

The sign test assigns a plus or minus sign to each observation based on whether it is above or below a median value, and since each observation has only two outcomes (positive or negative), the sampling distribution of the number of positive or negative signs follows a binomial probability distribution.

Because Each Observation from a Sample for the Sign Test