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Which is the best college football conference in 2017?

Analysis

Every FBS team is a dot. Conference averages are not shown, and that is the point: the SEC’s mean is dragged up by four teams, the Big Ten’s spread is twice the Sun Belt’s, and a bar chart of means says none of it. What “compare the conferences” actually asks is how much of one league sits inside the other.

Average starting field position · 2017

FBS medianSun BeltAmerican Athlet…Mid-AmericanACCSECFBS IndependentsMountain WestPac-12Big TenBig 12Conference USA

One dot per team, one tick per conference median. Leagues are ordered by median, and the mean is deliberately not shown — four teams drag it and it hides how far the two distributions overlap.

ConferenceTeamsMedianSpreadBest
Sun Belt1232.52.6Arkansas State 37.3
American Athletic1232.24.6UCF 35.5
ACC1432.11.5Virginia Tech 36.1
Mid-American1232.13.3Western Michigan 39.4
SEC1431.92.3Alabama 35.1
FBS Independents431.42.5Massachusetts 33.2
Mountain West1231.42.5Boise State 34.7
Big Ten1431.31.9Penn State 37.4
Pac-121231.33.2Washington 35.4
Big 121030.83.3Kansas State 37.6
Conference USA1430.62.7Florida Atlantic 33.8

Two numbers, not one

Median answers “how good is this league”. Spread — the interquartile range — answers “how evenly good”, and it is usually the more interesting of the two. A league with a high median and a huge spread is four contenders and eight teams padding their records, which is exactly the shape that produces a conference champion who keeps losing in January.

Note which metric you are looking at. CORE is opponent-adjusted, so it can be compared across leagues honestly. The raw metrics cannot: a conference that plays itself twelve times has its schedule strength baked into every raw number, which is the single most common way conference comparisons go wrong.