What is every Big 12 Conference team's record against the over/under line as a home underdog in the 2015 season?

Definitions
Team Over Record Over % Under % Total +/-
Texas Tech 2-0-0 100.0% 0.0% +34.5
Oklahoma St 3-0-0 100.0% 0.0% +8.0
Kansas St 2-2-0 50.0% 50.0% +4.8
Kansas 3-3-0 50.0% 50.0% -0.7
Texas 1-1-0 50.0% 50.0% +12.5
Iowa State 1-2-1 33.3% 66.7% -4.6
TX Christian 0-1-0 0.0% 100.0% -25.5