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Statistical classification is the problem of identifying the sub-population to which new observations belong, where the identity of the sub-population is unknown, on the basis of a training set of data containing observations whose sub-population is known. Therefore these classifications will show a variable behavior which can be studied by statistics.

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Equivalent of AUC (area under the ROC curve) for two variables

I was wondering if there is a way to compute AUC using two variables instead of one as predictors. I got two populations after a follow-up, divided in Cases and Controls according to whether they had …