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Pythagorean expectation is a sports analytics formula devised by Bill James to estimate the percentage of games a baseball team "should" have won based on the number of runs they scored and allowed. Comparing a team's actual and Pythagorean winning percentage can be used to make predictions and evaluate which teams are over-performing and under ...
The resulting percentage is often compared to a team's true winning percentage, and a team is said to have "overachieved" or "underachieved" compared to the Pythagorean expectation. For example, Bill Barnwell calculated that before week 9 of the 2014 NFL season, the Arizona Cardinals had a Pythagorean record two wins lower than their real ...
Run differential has a strong correlation to a team's winning percentage, [8] [9] [10] which is characterized by a formula known as the Pythagorean expectation, devised by Bill James. Team Quality Balance
Pythagorean expectation: estimates a team's expected winning percentage based on runs scored and runs allowed; MLB statistical standards
The rating percentage index, commonly known as the RPI, is a quantity used to rank sports teams based upon a team's wins and losses and its strength of schedule.It is one of the sports rating systems by which NCAA basketball, baseball, softball, hockey, soccer, lacrosse, and volleyball teams are ranked.
Law of total expectation; Law of total probability; Law of total variance; Law of truly large numbers; Layered hidden Markov model; Le Cam's theorem; Lead time bias; Least absolute deviations; Least-angle regression; Least squares; Least-squares spectral analysis; Least squares support vector machine; Least trimmed squares; Learning theory ...
Win Shares is a 2002 book about baseball written by Bill James and Jim Henzler. The book explains how to apply the concept of sabermetrics to assess the impact of player performance in a combination of several areas, including offensive, defensive, and pitching on their team's overall performance.
The strength of schedule can be calculated in many ways. Such calculations are the basis of many of the various tie-breaking systems used in Swiss-system tournaments in chess and other tabletop games.