Author Question: As a rule of thumb, the sampling distribution of the sample proportions can be approximated by a ... (Read 140 times)

natalie2426 · **on:** Jun 24, 2018

As a rule of thumb, the sampling distribution of the sample proportions can be approximated by a normal probability distribution whenever
a. np 5
b. n(1 - p) 5 and n 30
c. n 30 and (1 - p) = 0.5
d. None of these alternatives is correct.

Question 2

As the sample size increases, the variability among the sample means
a. increases
b. decreases
c. remains the same
d. depends upon the specific population being sampled