Suppose you wanted to include marital status, a nominal-scale variable with five categories, in a multiple regression analysis. This would require the
A) creation of four dummy variables.
B) creation of five dummy variables.
C) analysis of four different multiple regressions.
D) analysis of five different multiple regressions.

Question

Quizplus · Accepted Answer

In multiple regression, for a nominal variable with k categories, you create k-1 dummy variables. For marital status with five categories, you need four dummy variables.

Suppose You Wanted to Include Marital Status, a Nominal-Scale Variable