In a regression equation that uses sex (Male=0, Female=1), years of education, and the interaction effect between sex and education, all of the resulting slopes are statistically significant. We find that the two parent slopes have positive values and the slope for the interaction effect has a negative value half the size of the slope for education. Which of the following best describes the resulting graphs?
A) The male line starts above the female line and continues to pull away from the female line.
B) The male line starts above the female line, but the female line starts to catch up with the male line.
C) The female line starts above the male line and continues to pull away from the male line.
D) The female line starts above the male line, but the male line starts to catch up with the female line.

Question

Quizplus · Accepted Answer

The positive slope for education means both lines increase with education. The negative interaction effect means the female line's slope is less steep, so the male line catches up.

In a Regression Equation That Uses Sex (Male=0, Female=1), Years