When modeling E(y)with a single qualitative independent variable, the number of 0-1 dummy
variables in the model is equal to the number of levels of the qualitative variable.

Question

Quizplus · Accepted Answer

When modeling $E(y)$ with a single qualitative independent variable, the number of 0-1 dummy variables required is equal to the number of levels of the qualitative variable minus one, to avoid the dummy variable trap and ensure the model is identifiable.

When Modeling E(y)with a Single Qualitative Independent Variable, the Number