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    Corelation between two dichotomous variables

    I have a data from a research with responses (yes/no) about three questions (A,B,C) and I would to see if the variables are correlated. First of all i compared the proportion of agreement(yes-yes, no-no) of them. The results was: A-B= 78% A-C=59% B-C is out of my objective. So I run a Pearson...