Question: A random sample of n = 21 is selected from a population that is normally distributed with mean u = 23.8 and standard deviation

A random sample of n = 21 is selected from a population

A random sample of n = 21 is selected from a population that is normally distributed with mean u = 23.8 and standard deviation = 9.8. What is the standard deviation of the sampling distribution of the sample mean?

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