PSY340: Statistics for the Social Sciences

Part I: We won't be doing any multiple regression problems by hand.

1) (a) Predict college gpa based on math SAT.
(b) Predict college gpa based on verbal SAT.
(c) Predict college gpa based on math and verbal SAT
(d) Why does adding verbal SAT to the math SAT increase r-squared by such a small amount?

2) Consider models predicting college gpa based on high school math, science, and english. Which combination of factors do you belive lead to the "best" model for predicting college gpa? Explain your rationale.