oppg9.3 <- function(){
#Last inn data
data(kap9, envir = environment())
kap9 <- kap9
#Utvid modell
mod2<-lm(Skepsis~KultSkepsis+
Inntekt+
Alder+Alder2+
Prekaritet*Innvandrer,
data=kap9,
na.action = "na.exclude")
#Hent inn car-pakken
#library(car)
loadNamespace("car")
#Opprett grafikk
car::residualPlot(mod2)
}
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