http://www.commres.net/ 2026-04-17T11:13:11+00:00 http://www.commres.net/ http://www.commres.net/_media/wiki/logo.png text/html 2019-03-24T23:04:34+00:00 Anonymous (anonymous@undisclosed.example.com) http://www.commres.net/c/ms/2019/schedule/week03?rev=1553468674&do=diff Week 3 내용 Central Tendency * Central Tendency (집중경향) * Dispersion (variability) -- 분산(변산성) * range * outliers: It is beyond our scope. Please just refer to it. Won't be appearing in tests. * Variance 분산 혹은 변량 * 표본변량 $ s^2 $$ \sigma^2 $$ \displaystyle S_x^2 = \displaystyle \frac {\Sigma X^2 - \frac{(\Sigma X)^2}{N} } {N-1} $$ \displaystyle \sigma_x^2 = \displaystyle \frac {\Sigma X^2 - \frac{(\Sigma X)^2}{N} } {N} = \displaystyle \frac {\Sigma X^2}{N} - \frac {(\Sigma X)^2}{N^2} …