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--- degrees_of_freedom [2017/03/17 11:52] – hkimscil
+++ degrees_of_freedom [2019/09/24 10:36] – hkimscil
@@ Line 61: / Line 61: @@
 수학적인 증명을 보려면 [[:why n-1]] 참조
+<code>> k <- c(2, 3, 2, 4, 5, 5, 2, 2, 4, 1)
+> mean(k)
+[1] 3
+> var(k)
+[1] 2
+> sd(k)
+[1] 1.414214
+>
+> ks <- sample(k, 4)
+> ks
+[1] 2 5 2 2
+> mean(ks)
+[1] 2.75
+> sd(ks)
+[1] 1.5
+> (sd(ks)*3)/4
+[1] 1.125
+>
+</code>
 {{tag>"research methods" statistics n-1 "degrees of freedom" 자유도}}