What is every Big 12 Conference team's record against the over/under line as a home underdog in the 2019-2020 season?

Definitions
Team Over Record Over % Under % Total +/-
Kansas St 4-1-0 80.0% 20.0% +10.3
Oklahoma St 2-1-0 66.7% 33.3% +1.7
Iowa St 2-2-0 50.0% 50.0% -4.3
TX Christian 1-3-0 25.0% 75.0% -3.5
Oklahoma 0-4-0 0.0% 100.0% -17.1
Texas 0-4-0 0.0% 100.0% -13.0
Texas Tech 0-1-0 0.0% 100.0% -5.0