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Similarity scores are among the many original sabermetric concepts first introduced by Bill James. James initially created the concept as a way to effectively compare non- Hall of Fame players to players in the Hall, to see who was either on track to make the HOF, or to determine if any eligible players had been snubbed by the selection committee.
A player who makes double digits in a game in any two of the PTS, REB, AST, STL, and BLK statistics is said to make a double double; in three statistics, a triple double; in four statistics, a quadruple double. A quadruple double is extremely rare (and has only occurred four times in the NBA).
New basketball positions were classified by Stanford University student Muthu Alagappan, who while working for the data visualization company Ayasdi, mapped the network of one season NBA players linking them by the similarity of their statistics. Then, based on node clusters players were grouped into 13 positions.
Advanced basketball statistics include effective field goal percentage (eFG%), true shooting percentage (TS%), (on-court/off-court) plus–minus, adjusted plus-minus (APM), real plus/minus (RPM), player efficiency rating (PER), offense efficiency rating, offensive rating, defensive rating, similarity score, tendex, and player tracking.
Hollinger argues that each two point field goal made is worth about 1.65 points. A three point field goal made is worth 2.65 points. A missed field goal, though, costs a team 0.72 points. Given these values, with a bit of math we can show that a player will break even on his two point field goal attempts if he hits on 30.4% of these shots.
Jerry West won the scoring title in 1970, averaging 31.2 points per game. Kareem Abdul-Jabbar won scoring titles in 1971 and 1972. Allen Iverson won scoring titles in 1999, 2001, 2002 and 2005. Kobe Bryant won scoring titles in 2006 and 2007. LeBron James won the scoring title in 2008 en route to becoming the NBA's all-time scoring leader in 2023.
The only pair that does not support the hypothesis are the two runners with ranks 5 and 6, because in this pair, the runner from Group B had the faster time. By the Kerby simple difference formula, 95% of the data support the hypothesis (19 of 20 pairs), and 5% do not support (1 of 20 pairs), so the rank correlation is r = .95 − .05 = .90.
New York Times. Wayne Winston is a professor of decision sciences at Indiana University and was a classmate of Jeff Sagarin at MIT. [19] He published several editions of a text on the Microsoft Excel spreadsheet software that includes material on ranking sports teams, as well as a book focused directly on this topic.