Even though the normal probability distribution deals with continuous variables, we can use it to approximate the binomial distribution whenever np 5 and also nq 5.

Question

Even though the normal probability distribution deals with continuous variables, we can use it to approximate the binomial distribution whenever np > 5 and also nq > 5.

Quizplus · Accepted Answer

This is known as the continuity correction rule and is a valid approximation technique in statistics. When np > 5 and nq > 5, the binomial distribution can be approximated by a normal distribution with mean np and standard deviation sqrt(npq).

Even Though the Normal Probability Distribution Deals with Continuous Variables