Условие:
A sample mean is computed from a population with a variance of 2.45 . The sample size is 40 . The standard error of the sample mean is closest to: A) 0.247 B) 0.039 C) 0.387

A sample mean is computed from a population with a variance of 2.45 . The sample size is 40 . The standard error of the sample mean is closest to: A) 0.247 B) 0.039 C) 0.387
Рассмотрим пошаговое решение:
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