STAT 20: Introduction to Probability and Statistics

Coined by Bill James in 1980, sabermetrics is

“the search for objective knowledge about baseball.”

- Henry Chadwick, a NY sportswriter, developed the box score in 1958
- “Percentage Baseball” by Earnshaw Cook in 1964
- The Bill James Baseball Abstract, annual book beginning in 1977
- Moneyball

- Specific metrics such as
- Baseball: On-base percentage is the percentage of times a player reaches base on either a hit, walk, or by being hit by a pitch.
- Football: DVOA (defense-adjusted value over average), which compares a player’s success on each play to the league average based on a number of variables including down, distance, location on field, current score gap, quarter, and strength of opponent.
- Soccer: Ball possession as the percent of the time that each team has the ball.

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