Question

A population of values has a normal distribution with = 247.7 and o = 98.6. You intend to draw a random sample of size n = 79. What is the mean of the distribution of sample means? Hi What is the standard deviation of the distribution of sample mean? 0 =

Answer 1

• The mean of the distribution of sample mean = population mean = 247.7
• The satandard deviation of the distribution of sample mean

                $=\frac{population \ {standard} \ deviation}{\sqrt{n}}=\frac{98.6}{\sqrt{79}}=11.093$