ChosenChildren
Well-Known Member
I didn't say they were #200 in defensive efficiency. I don't know what numbers are calculated there.
I said they ranked 200th in points per possession defense because that's exactly where they rank.
I looked up your site. You are correct - Iowa was #200 when the rankings are not adjusted for strength of schedule. Pomeroy adjusts for strength of schedule, and ranked Iowa #123. It doesn't really matter, but I truly believe that the Pomeroy system is a more reliable indicator of defensive efficiency. Iowa in 2016-17 gave up 1.02 points per possession.
What Pomeroy is basically saying is that if you play a very tough schedule (which Iowa did, #66 in the country), giving up 1.02 points per possession is better than a team giving up .95 ppp against a very weak schedule (as an example). You have to adjust for strength of schedule before you can compare apples to apples. I'm no expert, but I know the NCAA selection committee used Pomeroy as one of their final ranking indicators.