mean和median的区别？

区别

mean

翻译：均值
叙述：把一组序列中的所有值加起来，然后除以总个数，就是均值。
适用范围：正态分布 (Normal Distribution)
数据集相关性：均值不是一个稳健的衡量工具，因为它会被异常值大大的影响到。

median

翻译：中间值
叙述：把一组序列按照升序的方式排列，然后取中间的那个值，就是中间值
适用范围：偏态分布 (Skewed Distribution)
数据集相关性：中间值非常适合偏态分布，因为它源自集中趋势（central tendency），因此它是更稳健和明智的。

Mean (or average) and median are statistical terms that have a somewhat similar role in terms of understanding the central tendency of a set of statistical scores. While an average has traditionally been a popular measure of a mid-point in a sample, it has the disadvantage of being affected by any single value being too high or too low compared to the rest of the sample.This is why a median is sometimes taken as better measure of a mid point.

参考

https://www.diffen.com/difference/Mean_vs_Median