Defense rankings of teams O beat as HC

Here is a topic for consideration in LSUs 5 wins with O as head coach:
How the hell is this a sample size to make a huge decision.

This is out of 128 teams.

Southern Miss total defense 19; rush defense 54
TAMU total defense 96; rush defense 83
Arkansas total defense 84; rush defense 102
Ole Miss total defense 101; rush defense 113
Missouri total defense 117; rush defense 118.
What the hell does this say about how difficult it is to call plays against these teams.