The procedure that utilizes the normal distribution to test the difference between two population proportions is valid for all sample sizes.

Question

Quizplus · Accepted Answer

The procedure that utilizes the normal distribution to test the difference between two population proportions requires that the sample sizes be large enough for the sampling distribution of the difference to be approximately normal. This is often assessed using the rule of thumb that both np and n(1-p) should be greater than 5 for both populations, where n is the sample size and p is the proportion.

The Procedure That Utilizes the Normal Distribution to Test the Difference