Logistic Regression Review

Prof. Maria Tackett

Nov 21, 2024

Announcements

  • Lab 06 and HW 04 due TODAY at 11:59pm

  • Statistics experience due Tuesday, November 26

  • Team Feedback #2 (from Teammates) due Tuesday, November 26

  • Project:

    • Project meetings: November 25 and 26

      • Click here to sign up (1 slot per team) by November 22
    • Project: Draft report due + peer review December 2

    • Round 1 submission (optional) due December 8 at 11:59pm

  • Lecture recordings available until December 5 at 11:45am (link on sidebar of course website)

Exam 02 format

  • 50 points total

    • in-class: 38 points

    • take-home: 12 points

  • In-class: 75 minutes during Thursday, December 5 lecture

  • Take-home: due Friday, December 6 at 11:59pm (grace period: can submit without late penalty until Saturday, December 7 at 11:59pm)

  • Need a note from your academic dean if you miss any part of the exam

Exam 02 content

Concepts from the first half of the semester continue to apply, but the exam will focus on new content since Exam 01.

Multiple linear regression

  • Maximum likelihood estimation

  • Model diagnostics

  • Multicollinearity

  • Variable transformations

  • Model comparison

Logistic regression

  • Probabilities, odds, odds ratios

  • Maximum likelihood estimation

  • Predicted probabilities and classes

  • ROC curve and AUC

  • Inference

  • Assumptions

  • Not on the exam: Newton-Raphson method

Tips for studying

  • Rework derivations from assignments and lecture notes

  • Review exercises in AEs and assignments, asking “why” as you review your process and reasoning

    • e.g., Why do we include “holding all else constant” in interpretations?
  • Understand similarities and differences between linear and logistic regression

    • How are interpretations for logistic regression similar to interpretations for linear regression with response \(\log(y)\)? How are they different?
  • Focus on understanding not memorization

  • Explain concepts / process to others

  • Ask questions in office hours

  • Review lecture recordings as needed

Application exercise