Day 9

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 test0
• predict p1 if test1
• sort age
• graph p0 p1 true age, c(ll.) s(ii.) ylab xlab
  l1(P)
• predict xb0 if test0, xb
• predict xb1 if test1, xb
• graph xb0 xb1 age, c(ll) s(ii) ylab xlab
  l1(Logit(p)B0 B1age)