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- W2061388360 abstract "SEVERAL algebraically equivalent methods are in use for calculating χ2 for a 2 × 2 contingency table; but there is one attractive algorithm that does not seem to have been described. Write the table and its marginal totals in the usual notation: where N = a + b + c + d. Let A be the difference between the two observed ratios when the table is read across, so that . Similarly, let D be the difference when the table is read downwards, so that . Then it can be shown that ." @default.
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- W2061388360 date "1951-12-01" @default.
- W2061388360 modified "2023-09-25" @default.
- W2061388360 title "Calculation of χ2 for a 2 × 2 Table" @default.
- W2061388360 doi "https://doi.org/10.1038/1681087a0" @default.
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