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A measure of association between two binary variables equal to the odds of a 'positive' outcome in 1 variable divided by the odds in the other. The OR ranges (0, infinity). It has a strong connection to logistic regression.

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Violating Cochran-Mantel-Haenszel assumption and alternative

I have student grade data (A, B, C, D, F) before and after a new course was introduced. I'd like to investigate if there are differences in the fractions of students scoring each of these grades. In R …
kozina-adjacent's user avatar