1.

If both the mean and the standard deviation of 50 observations x1, x2, …,x50 are equal to 16, then the mean of(x1 - 4)2, (x2 - 4)2,….(x50 - 4)2 is:

A. 400
B. 380
C. 525
D. 480
Answer» B. 380


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