A table for the rapid determination of the tetrachoric correlation coefficient
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A table is developed and presented to facilitate the computation of the PearsonQ3 (“cosine method”) estimate of the tetrachoric correlation coefficient. Data are presented concerning the accuracy ofQ3 as an estimate of the tetrachoric correlation coefficient, and it is compared with the results obtainable from the Chesire, Saffir, and Thurstone tables for the same four-fold frequency tables.
KeywordsPublic Policy Statistical Theory Rapid Determination Frequency Table Tetrachoric Correlation
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