Key Info and Announcements

Announcements

• Quiz 1 opens today!
• Lab 1 discussion exit ticket
  • If you weren’t in class and didn’t receive an email about the make-up assignment, please let me know
• HW 1 notes from TAs
  • Question 8d: summary output for lm vs glm
    • Mostly the same, actual values and fit statistics depend on the random component
    • And won’t mean the same thing
  • Check your assumptions!!
  • riskratio() function

Key Dates

• Quiz 1 opens 04/22
  • closes 04/26
• Lab 2 due 04/26

Last time

• Looked at interpretations and predicted values for our simple fitted logistic regression model
• Discussed how to interpret the estimated regression coefficients and the estimated odds ratios from our regression!
  • Did this for a continuous variable, binary variable, and multi-level categorical variable
• Calculated predicted probability for an individual/observation with a specific covariate value
• Calculated predicted probabilities across all values for a covariate (visualization part)
• Calculated the confidence intervals for all of these to get a sense of the significance of these estimated coefficients, odds ratios, and probabilities