What must be done to categorical variables in order to use them in a regression analysis?
A)nothing
B)dummy coding
C)problem coding
D)categorical coding

Question

Quizplus · Accepted Answer

Categorical variables cannot be directly included in a regression model. They must be converted into numerical variables using dummy coding. This involves creating a set of binary (0 or 1) variables to represent each level of the categorical variable. This allows the categorical variable to be included in the regression model as a predictor variable.

What Must Be Done to Categorical Variables in Order to Use