What is the response variable? A statistician was interested in determining what predictors are related to an employee's salary. Candidate predictors are employee's GPA, GRE score, a categorical School variable representing the type of schooling system (UC, UT, private (reference group)) and marital status (married or not). The following output showed some steps from a forward selection regression with a pvalue of entry set to be 0.15. (Rows 5 and 6 referred to the step considered after GPA and GRE have been chosen)