NO.PZ2019040801000017
问题如下:
The probability that a standard normally distributed random variable will be less than one standard deviation above its mean is:
选项:
A.0.6827.
B.0.8413.
C.0.3173.
D.0.1587.
解释:
B is correct
考点:正态分布查表
解析:题目问,对于正态分布,随机变量小于均值以上一倍标准差的概率是多少?查表得到P(X<1) = 0.8413