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Find the standard error of sample mean

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

A. 0.80 points
B. 2.45
C. 4
D. 25

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Category:- Statistics and Probability
Reference No.:- M921744

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