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Yahoo!奇摩知識+ - 分類問答 - 科學常識 - 發問中
信賴區間的問題 (急).....
Jun 18th 2013, 00:56

大學對校內10000格男生做健康檢查後,從其中隨機取100個男生,記錄其平均身高為a.在操作多次後,得到a的平均數=165.34公分,標準差Sa=10.4公分,試問這10000個男生的平均身高在0.6826的信心水準之下,信賴區間為何?

為什麼標準差10.4要除以根號100????

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