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Message: [QUOTE="Millhouse, post: 1177638, member: 78"] fwiw ranked yards per play (ypp) offense, ypp defense, and ypp margin for each team this year. then i correlated the rank of offense ypp to ypp margin then correlated defense ypp to ypp margin offense is 73% correlated, defense is 66% if the goal is to be better than your opponents in yards allowed and gained per play, being better at offense gets you a little farther. maybe it's just because there is a lower bound on defense and no upper bound on offense. last year the correlation was 80% on offense, 75% on defense. last year the difference between the 20th and 80th percentile offense is .2 yards more than the difference between the 20th and 80th percentile offense i wanted to leave out the tails because horrible dregs and amazing factories throw it off. the point is that moving up the same number of spots on offense makes a slightly bigger yardage difference than the same improvement on defense. [/QUOTE]