From a population of 500 elements, a sample of 225 elements is selected. It is known that the variance of the population is 900.-未来题库

From a population of 500 elements, a sample of 225 elements is selected. It is known that the variance of the population is 900.

From a population of 500 elements, a sample of 225 elements is selected. It is known that the variance of the population is 900. The standard error of the mean is approximately

A.1.1022

B.2

C.30

D.1.4847

正确答案：1.4847

Tags:population elements The

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