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Exploring Logistic Regression: Comparing Logit and Logistic Functions for Age Prediction

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Presentation Transcript

  1. Day 9 Logistic Regression

  2. logit versus logistic • logit true test • logistic true test • logistic true test age

  3. Logistic functions • lstat • lroc • lsens

  4. Fitted Probabilities • predict p0 if test==0 • predict p1 if test==1 • sort age • graph p0 p1 true age, c(ll.) s(ii.) ylab xlab l1(“P”) • predict xb0 if test==0, xb • predict xb1 if test==1, xb • graph xb0 xb1 age, c(ll) s(ii) ylab xlab l1(“Logit(p)=B0 + B1age”)

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