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| | Science of Baseball: Baseball Time Machine: Definition of Terms & About the Time Machine |
 | | For example, if he was 10% above the league average in 1920 -- say the average was.290 and he hit.320 --then, if I moved him to 1963 and the league average was.240, his average would be 10% higher, which would be.264. |
 | | To see the formula, league averages for every year from 1871 to 1995, and the original stats for Willie Mays, Hank Aaron, and Mark McGwire, click here. |
 | | Production -- On Base Percentage plus Slugging Average; a simple but elegant measure of batting prowess, in that the weakness of one-half of the formulation, On Base Percentage iscountered by the strength of the other, Slugging Average, and vice versa. |
| www.exploratorium.edu /baseball/stat-definitions.html (896 words) |
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