GPA2.DES sat tothrs colgpa athlete verbmath hsize hsrank hsperc female white black hsizesq Obs: 4137 1. sat combined SAT score 2. tothrs total hours through fall semest 3. colgpa GPA after fall semester 4. athlete =1 if athlete 5. verbmath verbal/math SAT score 6. hsize size graduating class, 100s 7. hsrank rank in graduating class 8. hsperc 100*(hsrank/hssize) 9. female =1 if female 10. white =1 if white 11. black =1 if black 12. hsizesq hsize^2