Determine the standard error of sample mean

Reference no: EM1321179

If random samples, each with n = 25 scores, are selected from a normal population with u, = 80 and a = 20, and the mean is calculated for each sample, then the average distance between M and u would be:

A. 0.80 points

B. 2.45

C. 4

D. 25

Reference no: EM1321179

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