这个统计不错，尽管median有局限，层次高的数据点太少。

来源: 糖果果于 2017-12-28 23:08:00 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.