Open actuarialcat opened 5 years ago
The question requires the use of multiple linear regression. The predictor "origin" is stored as a num, but it is a qualitative data. Shouldn't it be change to factor using the following code before doing the regression?
origin_fac = factor(Auto$origin, levels = c("American","European","Japanese")) new_data = subset(Auto, select = -c(name,origin)) new_data = new_data.frame(new_data, origin_fac) lm.fix = lm(mpg~. ,data= new_data)
The question requires the use of multiple linear regression. The predictor "origin" is stored as a num, but it is a qualitative data. Shouldn't it be change to factor using the following code before doing the regression?