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dosnow
2010 Mar 28
6
Coding of categorical variables for logistic regression?
Hello,
I am trying to do a logistic regression and have one predictor variable
(x) that is ratio and two predictor variables (y and z) that are
categorical. These have three levels each which I have called "High",
"Medium" and "Low".
My question: do I need to use a numerical coding scheme for the
categorical variables as required by some statistical software