OG的math review里面的Descriptive Statistics说道 Note that for a large set of data(for example, the salaries of 800 conpany employees), it is often true that about half of the data is less than the median and about half of the data is greater than the median; but this is not always the case, as following data show 3,5,7,7,7,7,7,7,8,9,9,9,9,10,10 Here the median is 7, but only 2/15 of the data is less than the median 这里说不是意思说在一个large set里面一定是一半大于median，一半小于median的？？？这个large set要多large才算large???? 由相关知识点习题么？？？ 多谢~~ | 
