The use of the normal probability distribution as an approximation of the sampling distribution of $\bar { p }$ is based on the condition that both np and n(1 - p) equal or exceed _____.
A) .05
B) 5
C) 15
D) 30

Question

Quizplus · Accepted Answer

The correct condition for using the normal probability distribution as an approximation of the sampling distribution of $\bar { p }$ is that both np and n(1 - p) are equal to or greater than 5. This is a rule of thumb for ensuring that the sample size is sufficiently large for the normal approximation to be appropriate.

The Use of the Normal Probability Distribution as an Approximation pˉ\bar { p }pˉ​

The Use of the Normal Probability Distribution as an Approximation $\bar { p }$