单选题 Standardizing a normally distributed random Variable requires the:

A、

A. mean, variance and skewness.
B、

B. mean and the standard deviation.
C、

C. natural logarithm of X.

【正确答案】 B

【答案解析】All that is necessary is to know the mean and the variance. Subtracting the mean from the random variable and dividing the difference by the standard deviation standardizes the variable.