Imagine We Wanted to Investigate Whether a Person's Profession Can

Multiple Choice

Imagine we wanted to investigate whether a person's profession can predict scores on a self-report psychopathy scale. We collected data from people in eight different professions and a group of unemployed people. The eight professions were: bank traders, insurance brokers, health care professionals, business executives, volunteer workers, full-time mums, teachers, construction workers. The outcome was psychopathy score. If we wanted to analyse these data using regression, how many dummy variables would we need?

A) 7
B) It is not possible to analyse these data with regression.
C) 8
D) 9