Consider the regression model Wage=β1+β2School+β3(School×Female)+u where, Wage = individual's daily wage School = years of schooling Female = 1 if the individual is female, = 0 if the individual is male
And suppose the estimated coefficients b1, b2, and b3 are all different from 0.
If we plot:
(1) the predicted relation between Wage and School for females and
(2) the predicted relation between Wage and School for males, then the plot of (1) and (2) will have the same or different intercept and the same or different slope?