這裏應該是和概率分布有關，而不是因為數據異常或樣本少。如F-distribution，標準差大於均值常見。

來源: 湖西於 2025-10-09 16:57:32 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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