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[確率・統計演習] 平均と標準偏差と信頼区間

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家でメダカを飼っている。全部の長さを調べたところ下記の通りだった。
平均と標準偏差を求めよ。

double[] dd = {11, 13, 12, 16, 18, 19, 14, 17};

庭でメダカを飼っている。8匹すくってみたところ、長さは上記の通りだった。
標準偏差と95%信頼区間を求めよ。

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