NO.PZ2015120604000150
问题如下：
Evelyn Smith is studying about the relationship of the -distribution and the F-distribution. Which of the following conclusion is most appropriate?
选项：
A.Both of their variances are smaller than their means.
B.Both of them are symmetrical.
C.Both of them can not be negative.
解释：
C is correct.
The F-distribution and the -distribution are positive and they are asymmetical. There is no solid relationship between the means and variances of this two distributions.
课件表格不是说的assumptions 下面都是normally distributed population，正态分布不是就是对称的吗
