问题如下：
Is a return distribution characterized by frequent small losses and a few large gains best described as having:
选项：
negative skew?
a mean that is greater than the median?
No
No
No
Yes
Yes
No
解释：
B is correct.
A distribution with frequent small losses and a few large gains has positive skew (long tail on the right side) and the mean is greater than the median.
请问为什么mean小于median？
