If the sample size (n) is large (say, n ≥ 30), then it is safe to model the sampling distribution of as a:
A) discrete distribution.
B) continuous distribution.
C) log-normal distribution.
D) normal distribution.

Question

If the sample size (n) is large (say, n ≥ 30), then it is safe to model the sampling distribution of  as a:
A) discrete distribution. 
B) continuous distribution. 
C) log-normal distribution. 
D) normal distribution.

Quizplus · Accepted Answer

If the sample size is large (n ≥ 30), then the central limit theorem applies and the sampling distribution of the mean is approximately normal. Therefore, D is the best choice as it represents the normal distribution.

If the Sample Size (N) Is Large (Say, N ≥