degrees_of_freedom
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degrees_of_freedom [2019/09/24 12:34] – hkimscil | degrees_of_freedom [2019/09/24 12:36] – hkimscil | ||
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수학적인 증명을 보려면 [[:why n-1]] 참조 | 수학적인 증명을 보려면 [[:why n-1]] 참조 | ||
- | |||
- | < | ||
- | > mean(k) | ||
- | [1] 3 | ||
- | > var(k) | ||
- | [1] 2 | ||
- | > sd(k) | ||
- | [1] 1.414214 | ||
- | > | ||
- | </ | ||
< | < | ||
+ | k <- c(2, 3, 2, 4, 5, 5, 2, 2, 4, 1) | ||
set.seed(1024) | set.seed(1024) | ||
ks <- sample(k, 4) | ks <- sample(k, 4) | ||
Line 79: | Line 70: | ||
sd(ks) | sd(ks) | ||
(sd(ks)*3)/ | (sd(ks)*3)/ | ||
+ | </ | ||
+ | |||
+ | < | ||
+ | > k <- c(2, 3, 2, 4, 5, 5, 2, 2, 4, 1) | ||
+ | > k | ||
+ | [1] 2 3 2 4 5 5 2 2 4 1 | ||
+ | > | ||
+ | > set.seed(1024) | ||
+ | > ks <- sample(k, 4) | ||
+ | > mean(ks) | ||
+ | [1] 2.25 | ||
+ | > sd(ks) | ||
+ | [1] 1.258306 | ||
+ | > (sd(ks)*3)/ | ||
+ | [1] 0.9437293 | ||
+ | > | ||
+ | > sd(k) | ||
+ | [1] 1.414214 | ||
+ | > | ||
+ | > mean(k) | ||
+ | [1] 3 | ||
</ | </ | ||
{{tag>" | {{tag>" | ||
degrees_of_freedom.txt · Last modified: 2021/03/03 11:24 by hkimscil