In the sign test applications, the normal approximation to the binomial distribution works very well even when the number of nonzero differences is as small as:
A) 5
B) 10
C) 15
D) 25
E) 30

Question

Quizplus · Accepted Answer

The normal approximation to the binomial distribution is generally considered acceptable when the number of trials (nonzero differences in the context of the sign test) is at least 10, as this provides a sufficient sample size for the approximation to be reasonably accurate.

In the Sign Test Applications, the Normal Approximation to the Binomial