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習題三

習題三 假定大學畢業生之平均每月收入為 26500 元 , 其變異數為 4202500 。至少應取得多少樣本？才能有 9X%(X 為學號最後一位數字 ) 的信賴水準 , 保證其估計誤差不超過 1000 元.

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習題三

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  1. 習題三 • 假定大學畢業生之平均每月收入為26500元, 其變異數為4202500。至少應取得多少樣本？才能有9X%(X為學號最後一位數字)的信賴水準, 保證其估計誤差不超過1000元

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