NO.PZ2017092702000102
问题如下：
In contrast to normal distributions, lognormal distributions:
选项：
A.
are skewed to the left.
B.
have outcomes that cannot be negative.
C.
are more suitable for describing asset returns than asset prices.
解释：
B is correct.
By definition, lognormal random variables cannot have negative values.
根据定义，对数正态随机变量不能有负值。
如题，跟正态分布比不是偏左吗
