http://www.commres.net/ 2026-04-17T14:55:13+00:00 http://www.commres.net/ http://www.commres.net/_media/wiki/logo.png text/html 2026-03-25T01:20:21+00:00 Anonymous (anonymous@undisclosed.example.com) http://www.commres.net/c/ms/2026/schedule/lecture_note_week_03?rev=1774401621&do=diff * variance = SS / df * SS = Sum of Sqaure (of (something)) * something = error, residual, deviation score (ds), (X변인의) total * df = n - 1 * Why n-1 * $s^2 = \widehat{\sigma}$ 을 위해서 분산값을 사용하는데 $\text{SS}$ 값을 구할 때 샘플의 평균을 이용하면 그 값이 항상 최소값이 되어서 이를 만회하기 위해서 n-1을 쓴다 text/html 2026-04-06T13:45:40+00:00 Anonymous (anonymous@undisclosed.example.com) http://www.commres.net/c/ms/2026/schedule/week06_t-test_and_anova_note?rev=1775483140&do=diff see anova note