ou have data on high school (HS) GPA and first-year (FY) college GPA for 16 of your friends. You run a regression model to understand if high school GPA is a significant predictor of college GPA. The results are presented below. a. To improve the model you add a new predictor variable to the regression model: Freshmen Credit Hours (FCH) because you suspect that a heavy course load may bring down student GPA. You find that the p-value for FCH is 23%. What does that mean? 2 points b. You add college major to the regression model and the p-value for FCH becomes 4%. Why does the p-value change from 23% to 4%