問題詳情

4.( ) If the mean of a normal distribution is negative, then
(A) the standard deviat ion must also be negative
(B)'the variance must also be negative
(C) a mistake has been made in the computations, because the mean of a normal distribution can not be negative
(D) the standard deviation must be zero
(E) None of these answers is correct.

參考答案

答案:[無官方正解]
難度:適中0.5
統計:A(0),B(0),C(0),D(0),E(0)

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