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Often, substitution is made depending on the play being run; for example, a team might bring in a fullback or tailback for a rushing play, or several wide receivers for a passing play. There are also major substitutions made for special teams plays such as punting or kicking a field goal. Players cannot be substituted during live ball play; if ...
The substitution of absent players happened as early as the 1850s, for example from Eton College where the term emergencies is used. [5] Numerous references to players acting as a "substitute" occur in matches in the mid-1860s [ 6 ] where it is not indicated whether these were replacements of absent players or of players injured during the match.
Free substitution — apparently intended to help lesser players by allowing longer rest breaks — was implemented in a rule change made April 7, 1943, "for the duration" of the war effort. [7] This was paired with a one-year rule change made in August reducing the size of wartime NFL rosters from 33 players to 28, in an effort to reduce the ...
The two-platoon system is a tactic in American football enabled by rules allowing unlimited substitution adopted during the 1940s. The "two platoons", offense and defense, are an integral part of the game today.
Also confidence coefficient. A number indicating the probability that the confidence interval (range) captures the true population mean. For example, a confidence interval with a 95% confidence level has a 95% chance of capturing the population mean. Technically, this means that, if the experiment were repeated many times, 95% of the CIs computed at this level would contain the true population ...
A platoon system in baseball or American football is a method for substituting players in groups (platoons), to keep complementary players together during playing time.. In baseball, it is usually used to optimize batting performance against pitchers of opposite handedness.
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For glossaries of terms, please place the glossaries in Category:Glossaries of sports and, if one exists, the sport-specific subcategory of Category:Sports terminology. Do not a create a sport-specific subcategory just to hold a lone glossary article (it will just get up-merged again at WP:CFD ).