[問題] 非常態數據轉換 VS 中央極限定理
今天我想對一個製程作管制圖
依照中央極限定理,當n夠大時,樣本平均數會"趨近"常態分配
因此,
問題一:即便樣本資料不符合常態,我是否可以直接拿來畫管制圖?
還是一定要將不符合常態的樣本先轉換成常態,
這樣畫出的管制圖才會比較準確? (會嘛?)
問題二:非常態樣本是否需要轉換或直接用中央極限定理,
兩者的衡量標準,
是取決於母體是否擁有接近常態的"證據"嘛?
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