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c:ms:2019:schedule:week03

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 — c:ms:2019:schedule:week03 [2019/03/25 07:34] (current)hkimscil created 2019/03/25 07:34 hkimscil created 2019/03/25 07:34 hkimscil created Line 1: Line 1: + ====== 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 $s^2$ + * 모집단변량(전집) $\sigma^2$ + * [[:Standard Deviation]] 표준편차 + * Variance calculation formula + * {{anchor:​variance_calculation_formula}} $\displaystyle S_x^2 = \displaystyle \frac {\Sigma X^2 - \frac{(\Sigma X)^2}{N} } {N-1}$ + * $\displaystyle \sigma_x^2 = \displaystyle \frac {\Sigma X^2 - \frac{(\Sigma X)^2}{N} } {N} = \displaystyle \frac {\Sigma X^2}{N} - \frac {(\Sigma X)^2}{N^2} = \displaystyle \frac {\Sigma X^2}{N} - \bigg(\frac {\Sigma X}{N}\bigg)^2 = \displaystyle \frac {\Sigma X^2}{N} - \mu^2$ + * [[:Degrees of Freedom]] N-1 + * [[:Why n-1]] + ===== Sampling Distribution,​ Standard Error ===== + * [[:​Sampling]] + * [[:Sampling Distribution]] + * [[:Central Limit Theorem]] + * [[:Standard Error]] + ===== CLT에 관한 정리 =====