As a general rule,one can use the normal distribution to approximate a binomial distribution whenever the sample size is at least 15.

Question

Quizplus · Accepted Answer

The rule of thumb for using the normal distribution to approximate a binomial distribution typically requires both np and n(1-p) to be greater than 5, where n is the sample size and p is the probability of success on a given trial. The sample size being at least 15 is not a general rule by itself.

As a General Rule,one Can Use the Normal Distribution to Approximate