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About the Pythagorean Method for Calculating Win Pct.

The Pythagorean Method gives an expected winning percentage using the fact that the ratio of a team's wins and losses is related to the number of points scored by the team raised to some exponent, which is usually taken to be 2.85 for the current NFL. This exponent would be slightly lower for the early years of football, but for our purposes we still use 2.85.

Expected Winning % = (Pts scored)^(2.85)/(Pts scored^(2.85) + Pts allowed^(2.85))

About statistical abbreviations

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