통계 > 비모수 검정 > Kruskal-Wallis 검정...
Statistics > Nonparametric tests > Kruskal-Wallis test...
carData 패키지에 있는 Friendly 데이터셋을 활용한다. https://rcmdr.tistory.com/153
Friendly 데이터셋
carData > Friendly data(Friendly, package="carData") help("Friendly")
rcmdr.kr
data(Friendly, package="carData")
Tapply(correct ~ condition, median, na.action=na.omit, data=Friendly) # medians by group
kruskal.test(correct ~ condition, data=Friendly)
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