r:dummy_variables_with_significant_interaction
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college <- read.csv("http://commres.net/wiki/_media/r/college.csv")
attach(college)
str(college)
head(college)
salary <- salary / 1000
public<-factor(public, c(0,1), labels=c('Private', 'Public'))
location<-factor(location, c(1,2,3,4), labels=c('S', 'MW','NE', 'W'))
m1 <- lm(salary~public+location)
m2 <- lm(salary~public*location)
summary(m1)
summary(m2)
r/dummy_variables_with_significant_interaction.1685636580.txt.gz · Last modified: 2023/06/02 01:23 by hkimscil