簡單隨機抽樣的樣本平均值的分配與樣本數 n 有何種關係？(A) 的變異數乘以 n 後為一個與 n 無關之常數(B) 的標準差乘以 n 後為一個與 n 無關之常數(C) 的變異數除以 n 後為一

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26.簡單隨機抽樣的樣本平均值的分配與樣本數 n 有何種關係？
(A) 的變異數乘以 n 後為一個與 n 無關之常數
(B) 的標準差乘以 n 後為一個與 n 無關之常數
(C) 的變異數除以 n 後為一個與 n 無關之常數
(D) 的標準差除以 n 後為一個與 n 無關之常數

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