Question: If random samples, each with n 5 9 scores, are selected from a normal population with m 5 80 and s 5 18, and the

If random samples, each with n 5 9 scores, are selected from a normal population with m 5 80 and s 5 18, and the mean is calculated for each sample, then how much distance is expected on average between M and m?

a. 2 points

b. 6 points

c. 18 points

d. Cannot be determined without additional information

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