Overview of Logistics Regression and its SAS implementation.
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model chd = age /
selection = stepwise
ctablepprob = (0 to 1 by 0.1)
In the events/trials syntax, you specify two variables that contain count data for a binomial experiment. These two variables are separated by a slash. The value of the first variable, events, is the number of positive responses (or events). The value of the second variable, trials, is the number of trials.
outputout=probs predicted=prob xbeta=logit;
format group gp.;