Homogeneity of Regression Slopes: Dummy Variables in R Video

Last Update: March 22, 2022

My online video tutorials are hosted at YouTube channel.

For learning this concept, you can view my online video tutorial: Homogeneity of Regression Slopes: Dummy Variables in R.

Video Code

1. Packages

library(AER)
library(lmtest)

2. Data

data(HousePrices)

3. Model

mlr1 <- lm(formula = price ~ lotsize + bedrooms, data = HousePrices)

4. Homogeneity

Wald Test

mlr2 <- lm(formula = price ~ lotsize + bedrooms + aircon + 
             lotsize*aircon + bedrooms*aircon, data = HousePrices)
summary(mlr2)
waldtest(object = mlr1, mlr2, test = "F")

Courses

My online courses are hosted at Teachable website.

For more details on this concept, you can view my Linear Regression in R Course.