4/2/2009

Chapter 8: Quantitative and Qualitative Predictors

• Problem Session: #8.6 and 8.7

• Qualitative Predictors
• Setup
• Interpretation of regression coefficients
• Interaction between qualitative and quantitative predictors
• Interpretation of regression coefficients
• Types of interaction

1. ordinal

2. disordinal

• Example: Copier Maintenance #8.15

For Tuesday: Prepare Chapter 8 problems #8, 15, 19 for a Problem Session.