The central limit theorem says that when a simple random sample of size n is drawn from any population with mean μ and standard deviation σ, then when n is sufficiently largeSelect ALL correct answers多项选择题

题目图片
A

a. the distribution of the sample mean is approximately Normal.

B

b. the distribution of the sample mean is exactly Normal.

C

c. the variance of the sample mean is σ2/n.

D

d. the distribution of the population is approximately Normal.

E

e. the mean of the sampling distribution of sample mean is the same as the population mean μ.

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