考試 - 考試

By Adele
at 2013-06-02T13:43
at 2013-06-02T13:43
Table of Contents
兩個獨立樣本T檢定
變異數未知但已知相等要用混合變異數Sp
變異數未知且不相等用樣本變異數去推母體變異數...
如果題目沒講變異數是否相等,那是否要先檢定變異數,判斷要不要用混合變異數,
然後才能檢定平均值??
兩樣本比例的檢定何時要用混和比例去算呢?
--
變異數未知但已知相等要用混合變異數Sp
變異數未知且不相等用樣本變異數去推母體變異數...
如果題目沒講變異數是否相等,那是否要先檢定變異數,判斷要不要用混合變異數,
然後才能檢定平均值??
兩樣本比例的檢定何時要用混和比例去算呢?
--
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