What is Skewness?

Skewness is a measure of asymmetry or distortion of symmetric distribution. It measures the deviation of the given distribution of a random variable from a symmetric distribution, such as normal distribution. 

A normal distribution is without any skewness, as it is symmetrical on both sides. Hence, a curve is regarded as skewed if it is shifted towards the right or the left.

什么是偏度？

偏度是对称分布的不对称性或失真的量度。它测量随机变量的给定分布与对称分布（例如正态分布）的偏差。

正态分布没有任何偏度，因为它在两侧是对称的。因此，如果曲线向右或向左移动，则认为曲线是有偏度的。

参考：

https://corporatefinanceinstitute.com/resources/data-science/skewness/