Efficiency margin: points per possession (PPP) minus opponent PPP 2005, conference games only 1. Illinois (+0.24) 2. Michigan State (+0.18) 3. Wisconsin (+0.06) 4. Ohio State (+0.03) 5. Indiana (+0.03) 6. Iowa (+0.02) 7. Minnesota (0.00) 8. Purdue (-0.08) 9. Northwestern (-0.11) 10. Michigan (-0.15)11. Penn State (-0.24)