Lesson plan
Sinclair coefficient
The Sinclair Coefficients are a method to compare different weight classes in Olympic weightlifting. It replaced Hoffman's formula, which was the first statistical analysis of this type. The method provides the answer to the question "What would be the total of an athlete weighing kg if he/she were an athlete in the heaviest class of the same level of ability?", given by the formula: × = SINCLAIR TOTAL. Since 1 November 2018, there are ten bodyweight categories for each gender. For men, they are 55 kg, 61 kg, 67 kg, 73 kg, 81 kg, 89 kg, 96 kg, 102 kg, 109 kg, and +109 kg, and for women: 45 kg, 49 kg, 55 kg, 59 kg, 64 kg, 71 kg, 76 kg, 81 kg, 87 kg and +87 kg. There are two types of lifts: snatch, and clean and jerk. However, at most championships, medals are presented for both lifts and the total (the combined result of the best snatch and the best clean and jerk). To compare and rank the results, especially between bodyweight categories, the International Weightlifting Federation uses the Sinclair Coefficients which are derived statistically and calculated for one Olympic cycle (for four years, starting in the Spring of each Olympic year). The total for each bodyweight category is a projection of the Total for that weightlifter if he/she were a competitor in the heaviest bodyweight category with the same level of ability.…
Article summary
The Sinclair Coefficients are a method to compare different weight classes in Olympic weightlifting. It replaced Hoffman's formula, which was the first statistical analysis of this type. The method provides the answer to the question "What would be the total of an athlete weighing kg if he/she were an athlete in the heaviest class of the same level of ability?", given by the formula: × = SINCLAIR TOTAL. Since 1 November 2018, there are ten bodyweight categories for each gender. For men, they are 55 kg, 61 kg, 67 kg, 73 kg, 81 kg, 89 kg, 96 kg, 102 kg, 109 kg, and +109 kg, and for women: 45 kg, 49 kg, 55 kg, 59 kg, 64 kg, 71 kg, 76 kg, 81 kg, 87 kg and +87 kg. There are two types of lifts: snatch, and clean and jerk. However, at most championships, medals are presented for both lifts and the total (the combined result of the best snatch and the best clean and jerk). To compare and rank the results, especially between bodyweight categories, the International Weightlifting Federation uses the Sinclair Coefficients which are derived statistically and calculated for one Olympic cycle (for four years, starting in the Spring of each Olympic year). The total for each bodyweight category is a projection of the Total for that weightlifter if he/she were a competitor in the heaviest bodyweight category with the same level of ability.…
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Discussion questions
- Summarise the article in your own words. Which single claim would you verify first, and why?
- Which claim in this article is most likely to be revised as the sources update? How would you check its current status?
- If two sources disagreed about one of these facts, what would you need in order to trust one over the other?
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