As a Rule of Thumb, the Sampling Distribution of the Sample

Multiple Choice

As a rule of thumb, the sampling distribution of the sample proportions can be approximated by a normal probability distribution whenever

A) np $\ge$ 5, n $\ge$ 30.
B) np $\ge$ 5 and n(1-p) $\ge$ 5.
C) n $\geq$ 30 and (1 - p) = 0.5.
D) none of these alternatives is correct.