NO.PZ2017092702000099
问题如下:
Which parameter equals zero in a normal distribution?
选项:
A.Kurtosis
B.Skewness
C.Standard deviation
解释:
B is correct.
A normal distribution has a skewness of zero (it is symmetrical around the mean). A nonzero skewness implies asymmetry in a distribution.
正态分布的偏度为零(围绕均值对称)。 非零偏度意味着分布不对称。
正态分布,偏度和标准差是不是应该都为0?