http://www.commres.net/ 2026-04-17T11:15:20+00:00 http://www.commres.net/ http://www.commres.net/_media/wiki/logo.png text/html 2025-11-06T04:30:20+00:00 Anonymous (anonymous@undisclosed.example.com) http://www.commres.net/c/ps1/2025/quiz03_exercise?rev=1762403420&do=diff 하나의 주사위를 던졌을 때의 기대값은 무엇인가? 아래처럼 쓰면 정답 dc <- c(1,2,3,4,5,6) p <- 1/6 sum(dc*p) # 정답 p = 1/6 라고 하면 1p + 2p + 3p + 4p + 5p + 6p (정답) = 3.5 (정답) 평균이 40, Standard deviation 값이 16인 모집단이 있다. 모집단에서 25명을 probability sampling방법을 취하여 샘플로 취하였다. 이 샘플의 평균이 42점보다 큰 점수가 나올 확률은? R에서 명령어를 이용하여 구하시오. text/html 2025-12-09T23:24:43+00:00 Anonymous (anonymous@undisclosed.example.com) http://www.commres.net/c/ps1/2025/schedule?rev=1765322683&do=diff Class page Mon Thur 10:30 Week 01: Sep 1, 3 Week 02: Sep 8, 10 Week 03: Sep 15, 17 Week 04: Sep 22, 24 Week 05: Sep 29, Oct 1 Week 06: Oct 6, 8 Week 07: Oct 13, 15 Week 08: Oct 20, 22 Week 09: Oct 27, 29 Week 10: Nov 3, 5 Week 11: Nov 10, 12 Week 12: Nov 17, 19 Week 13: Nov 24, $ \overline{X} = \hat{\mu} $$ \overline{s^2} = \hat{\sigma} $\begin{equation*} \label{eq1} \begin{split} \text{Inferential Statistics} & = & \frac {\text{Effects}} {\text{Random Error}} \\ \\ & = & \frac {\text{Differen… text/html 2025-12-02T23:36:34+00:00 Anonymous (anonymous@undisclosed.example.com) http://www.commres.net/c/ps1/2025/t-test_note?rev=1764718594&do=diff t-test with two (independent) groups A group vs B group score difference