可以很简单的相对于各州收入的中位数做加权处理。高中生都会的计算。

来源: 评论2012 于 2018-06-17 15:00:01 [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.

Change Ad Consent