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Consider data arranged into k 2×2 contingency tables. The principal result is the derivation of a statistical test for making an inference on whether each of the k contingency tables has the same relative risk. The test is based on a conditional reference set and can be regarded as an extension of the Fisher-Irwin treatment of a single 2 × 2 contingency table. Both exact and asymptotic procedures are presented.
Marvin Zelen (Fri,) studied this question.