回答編集履歴
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説明追加
test
CHANGED
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@@ -18,8 +18,20 @@
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```R
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sum((yy - mean(yy))^2) / length(yy)
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# [1] 1
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```
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`(不偏分散) x (N-1) / N `
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でも求まります。
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```R
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var(yy) * (length(yy) - 1) / length(yy)
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# [1] 1
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```
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