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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.

Offense explosiveness · 2017

FBS medianAmerican Athlet…Sun BeltSECBig 12Mid-AmericanFBS IndependentsConference USAACCPac-12Mountain WestBig Ten

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
American Athletic121.30.105Memphis 1.5
Sun Belt121.30.101App State 1.3
SEC141.20.178Georgia 1.3
Big 12101.20.134Baylor 1.5
Mid-American121.20.091Central Michigan 1.3
FBS Independents41.20.323Notre Dame 1.4
Conference USA141.20.095Florida Atlantic 1.3
ACC141.20.152Louisville 1.3
Pac-12121.20.107Stanford 1.4
Mountain West121.20.119San Diego State 1.4
Big Ten141.20.115Penn State 1.4

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.