http://commres.net/ 2026-05-03T19:49:55+00:00 http://commres.net/ http://commres.net/_media/wiki/logo.png text/html 2026-04-30T02:19:50+00:00 hkimscil (hkimscil@undisclosed.example.com) http://commres.net/c/mrm/2026/schedule/week_09/note?rev=1777515590&do=diff Statistical Test * DV: 숫자 * IV: 종류 한개일 경우 * 특성이 두가지: (4 종류의) t-test t.test() * 특성이 두가지 이상: F-test (anova) aov() * IVs: 종류이면서 2개 * factorial anova aov() * IV: 숫자 (종류) * text/html 2026-04-30T01:21:03+00:00 hkimscil (hkimscil@undisclosed.example.com) http://commres.net/c/mrm/2026/schedule?rev=1777512063&do=diff 이전 페이지 ---- exploring media theories * Week 01: March 2, 5 * Week 02: March 9, 12 * Week 03: March 16, 19 * Week 04: March 23, 26 (the 1st quiz) ---- choosing media theories * Week 05: March 30, April 2 * Week 06: April 6, 9 ---- developing and revising hypotheses text/html 2026-04-28T23:52:49+00:00 hkimscil (hkimscil@undisclosed.example.com) http://commres.net/c/ms/2026/w07_factorial_anova_note?rev=1777420369&do=diff see factorial anova * * sa factorial anova see repeated measure anova sa repeated measure anova text/html 2026-04-28T13:32:29+00:00 hkimscil (hkimscil@undisclosed.example.com) http://commres.net/r/factorial_anova?rev=1777383149&do=diff Two-way ANOVA Factorial ANOVA 라고도 부른다. rm(list=ls(all=TRUE)) ################################################# # two-way anova # subject = factor(paste('sub', 1:30, sep='')) ################################################# n.a.group <- 3 # a treatment 숫자 e.g: drug a1, a2, a3 n.b.group <- 2 # b 그룹 숫자 e.g.: exercise no(b1), yes(b2) n.sub <- 30 # 총 샘플 숫자 n.sub/n.a.group # 데이터 생성 set.seed(9) a <- gl(n.a.group, n.sub/n.a.group, n.sub, labels=c('drg1', 'drg2', 'drg3'… text/html 2026-04-28T13:19:28+00:00 hkimscil (hkimscil@undisclosed.example.com) http://commres.net/?image=r%3Apasted%3A20260428-131928.png&ns=r%3Apasted&rev=1777382368&tab_details=history&media_do=diff&do=media <img src="http://commres.net/_media/r/pasted/20260428-131928.png?w=500&amp;h=500&amp;tok=555f31" alt="20260428-131928.png" loading="lazy" width="500" height="500" /> text/html 2026-04-28T13:16:28+00:00 hkimscil (hkimscil@undisclosed.example.com) http://commres.net/?image=r%3Apasted%3A20260428-131628.png&ns=r%3Apasted&rev=1777382188&tab_details=history&media_do=diff&do=media <img src="http://commres.net/_media/r/pasted/20260428-131628.png?w=500&amp;h=500&amp;tok=c61017" alt="20260428-131628.png" loading="lazy" width="500" height="500" /> text/html 2026-04-28T13:15:58+00:00 hkimscil (hkimscil@undisclosed.example.com) http://commres.net/?image=r%3Apasted%3A20260428-131558.png&ns=r%3Apasted&rev=1777382158&tab_details=history&media_do=diff&do=media <img src="http://commres.net/_media/r/pasted/20260428-131558.png?w=500&amp;h=500&amp;tok=5bbae1" alt="20260428-131558.png" loading="lazy" width="500" height="500" /> text/html 2026-04-28T06:15:06+00:00 hkimscil (hkimscil@undisclosed.example.com) http://commres.net/interaction_effects_in_regression_analysis?rev=1777356906&do=diff interaction effects in regression analysis * Interpreting interaction coefficient in R (Part1 lm) UPDATED * How can I explain a continuous by continuous interaction? * Interaction effects between continuous variables PDF * see also ANCOVA E.g. 1 One category and one continuous Data 만들기 x<-runif(50,0,10) f1<-gl(n=2,k=25,labels=c("Low","High")) modmat<-model.matrix(~x*f1,data.frame(f1=f1,x=x)) coeff<-c(1,3,-2,1.5) y<-rnorm(n=50,mean=modmat%*%coeff,sd=0.5) dat<-data.frame(y=y,f1=f1,x=… text/html 2026-04-27T04:51:58+00:00 hkimscil (hkimscil@undisclosed.example.com) http://commres.net/r/repeated_measures_anova?rev=1777265518&do=diff Repeated measures ANOVA e.g. 1 demo1 <- read.csv("https://stats.idre.ucla.edu/stat/data/demo1.csv") ## Convert variables to factor demo1 <- within(demo1, { group <- factor(group) time <- factor(time) id <- factor(id) }) demo1 par(cex = .6) with(demo1, interaction.plot(time, group, pulse, ylim = c(5, 20), lty= c(1, 12), lwd = 3, ylab = "mean of pulse", xlab = "time", trace.label = "group")) demo1.aov <- aov(pulse ~ group * time + Error(id), data = demo1) summary(demo1.aov) text/html 2026-04-27T04:50:32+00:00 hkimscil (hkimscil@undisclosed.example.com) http://commres.net/?image=r%3Apasted%3A20260427-045032.png&ns=r%3Apasted&rev=1777265432&tab_details=history&media_do=diff&do=media <img src="http://commres.net/_media/r/pasted/20260427-045032.png?w=500&amp;h=500&amp;tok=20518a" alt="20260427-045032.png" loading="lazy" width="500" height="500" /> text/html 2026-04-27T04:50:26+00:00 hkimscil (hkimscil@undisclosed.example.com) http://commres.net/?image=r%3Apasted%3A20260427-045026.png&ns=r%3Apasted&rev=1777265426&tab_details=history&media_do=diff&do=media <img src="http://commres.net/_media/r/pasted/20260427-045026.png?w=500&amp;h=500&amp;tok=d7789c" alt="20260427-045026.png" loading="lazy" width="500" height="500" /> text/html 2026-04-27T04:50:18+00:00 hkimscil (hkimscil@undisclosed.example.com) http://commres.net/?image=r%3Apasted%3A20260427-045018.png&ns=r%3Apasted&rev=1777265418&tab_details=history&media_do=diff&do=media <img src="http://commres.net/_media/r/pasted/20260427-045018.png?w=500&amp;h=500&amp;tok=027caa" alt="20260427-045018.png" loading="lazy" width="500" height="500" /> text/html 2026-04-27T04:32:54+00:00 hkimscil (hkimscil@undisclosed.example.com) http://commres.net/repeated_measure_anova?rev=1777264374&do=diff See also, ANOVA, Factorial ANOVA, paired sample t-test repeated_measures_anova Repeated Measure ANOVA Introduction * one-way ANOVA for related, not-independent groups * extension of the dependent t-test (one group t-test, repeated measure t-test) * also, it is called “within-subjects ANOVA” or “ANOVA for correlated samples$\text{independent ANOVA: } F = \displaystyle \frac{MS_{between}}{MS_{within}} = \frac{MS_{between}}{MS_{error}}$$\text{rep measures ANOVA: } F = \displaystyle \frac{M… text/html 2026-04-20T04:39:27+00:00 hkimscil (hkimscil@undisclosed.example.com) http://commres.net/?image=pasted%3A20260420-043927.png&ns=pasted&rev=1776659967&tab_details=history&media_do=diff&do=media <img src="http://commres.net/_media/pasted/20260420-043927.png?w=500&amp;h=500&amp;tok=f574df" alt="20260420-043927.png" loading="lazy" width="500" height="500" /> text/html 2026-04-20T04:29:09+00:00 hkimscil (hkimscil@undisclosed.example.com) http://commres.net/?image=pasted%3A20260420-042909.png&ns=pasted&rev=1776659349&tab_details=history&media_do=diff&do=media <img src="http://commres.net/_media/pasted/20260420-042909.png?w=500&amp;h=500&amp;tok=f96358" alt="20260420-042909.png" loading="lazy" width="500" height="500" /> text/html 2026-04-20T04:29:02+00:00 hkimscil (hkimscil@undisclosed.example.com) http://commres.net/?image=pasted%3A20260420-042902.png&ns=pasted&rev=1776659342&tab_details=history&media_do=diff&do=media <img src="http://commres.net/_media/pasted/20260420-042902.png?w=500&amp;h=500&amp;tok=1c58c6" alt="20260420-042902.png" loading="lazy" width="500" height="500" /> text/html 2026-04-20T04:28:28+00:00 hkimscil (hkimscil@undisclosed.example.com) http://commres.net/?image=pasted%3A20260420-042828.png&ns=pasted&rev=1776659308&tab_details=history&media_do=diff&do=media <img src="http://commres.net/_media/pasted/20260420-042828.png?w=500&amp;h=500&amp;tok=34dfc1" alt="20260420-042828.png" loading="lazy" width="500" height="500" /> text/html 2026-04-20T04:20:58+00:00 hkimscil (hkimscil@undisclosed.example.com) http://commres.net/?image=pasted%3A20260420-042058.png&ns=pasted&rev=1776658858&tab_details=history&media_do=diff&do=media <img src="http://commres.net/_media/pasted/20260420-042058.png?w=500&amp;h=500&amp;tok=8f88af" alt="20260420-042058.png" loading="lazy" width="500" height="500" /> text/html 2026-04-20T04:19:30+00:00 hkimscil (hkimscil@undisclosed.example.com) http://commres.net/?image=pasted%3A20260420-041930.png&ns=pasted&rev=1776658770&tab_details=history&media_do=diff&do=media <img src="http://commres.net/_media/pasted/20260420-041930.png?w=500&amp;h=500&amp;tok=958b5e" alt="20260420-041930.png" loading="lazy" width="500" height="500" /> text/html 2026-04-19T22:40:25+00:00 hkimscil (hkimscil@undisclosed.example.com) http://commres.net/?image=c%3Ams%3A2026%3Aschedule%3Apasted%3A20260419-224025.png&ns=c%3Ams%3A2026%3Aschedule%3Apasted&rev=1776638425&tab_details=history&media_do=diff&do=media <img src="http://commres.net/_media/c/ms/2026/schedule/pasted/20260419-224025.png?w=500&amp;h=500&amp;tok=c8bf5d" alt="20260419-224025.png" loading="lazy" width="500" height="500" />