zhangmeili8292 发表于 2010-10-21 18:24 
什么是同质性检验?为什么进行同质性检验?
为什么平均数比较时T检验用,而U检验不用?
谢谢.尽量写通俗点.我的基础不是太好.
Where is the link in english,
http://en.wikipedia.org/wiki/Homogeneity_(statistics)
http://en.wikipedia.org/wiki/Homogeneity_and_heterogeneity
There are more references within the links