KenPom non-con SOS?

[BenEClone]

Please explain negative numbers.
ISU. -1.45 .210
OSU -2.45. 245
HOU .-3.48 .276

 

[Bader]

https://kenpom.com/blog/ratings-methodology-update/

AdjEM is the difference between a team’s offensive and defensive efficiency. It’s simple subtraction. Even your dog can do it. It represents the number of points the team would be expected to outscore the average D-I team over 100 possessions and it has the advantage of being a linear measure. The difference between +31 and +28 is the same as the difference between +4 and +1. It’s three points per 100 possessions which is much easier to interpret. This measure also makes the SOS and average conference strength numbers less mysterious.

You can see it for overall SoS. Iowa State's OppO is 108.8, and OppD is 98.5, resulting in +10.3. He just doesn't put the NonCon OppO and OppD on the free page