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## This calculator will compute both the exact hypergeometric probability and the exact two-tailed probability of obtaining a distribution of values in a 2x2

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### Many of these concepts are explained in detail in an online Evidence-based Medicine The reference used for CI calculation for RIOC is: Relative Improvement Over Phi Coefficient (= Cramer's Phi, and = Cohen's w Index, for 2x2 table);.

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