[商管] [統計]-假設檢定
小弟英文不好
想請問一下
A random sample of n=15 parts is tested for strehgth
and sample mean=2.68 with known variation 0.81.
Also, the strength of all parts is normally distributed.
小弟的問題點是在於題目中提到的變異數
在這樣的英文句法中
是要翻譯成母體的變異數還是樣本的變異數呢
因為如果定義錯誤
之後的小題也都會算錯
謝謝
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