Lesson on interpreting slope and intercept of a regression line, as well as how to create a residuals plot.

1. OBJECTIVES 1. 2. 3. HW REMINDERS Ch.7 and Ch. 8 Test Monday October 29

2. 4 1 2 3 5 10 15 20 1 2 3 4 20 5 10 15

4. Regression to the Mean FATHOM DEMO Multiplying # of SDs in X by r will keep us closer to the mean in Y.

5. Equation of Regression Line y = b 0 + b 1 x v MWT = (MHT) FWT = (FHT) Interpreting the Slope ( b 1 ) For each additional unit of X, Y will change by b 1 units. "Each additional unit of X is associated with b 1 units of Y."

6. Equation of Regression Line y = b 0 + b 1 x v MWT = (MHT) FWT = (FHT) Interpreting the Intercept ( b 0 ) For 0 units of X, we would expect b 0 units of Y.

7. Predicting Weights