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
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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