positive skew是如何判断出来的

问题如下：

Q. Compared to traditional equity investment, the historical return distribution of Bitcoins shows:

选项：

A.negative skewness.

B.high mean returns.

C.low standard deviation.

解释：

The correct answer is B. Historical Bitcoin returns are characterized by high mean returns and high standard deviation. Despite the high volatility, the return distribution is positively skewed.