Use the preparation materials to prepare hand-written answers for the following questions. Please ask any questions on the "Questions -- Preparation Guide" on the course Team (see link on the homepage).
- What type of response and explanatory variables define an Indicator Variable Regression (IVR)?
- What are two often-used synonyms for IVR?
- Define “covariate” and “factor” within the context of an IVR.
- What is an indicator variable?
- What is the purpose of an indicator variable?
- What numeric values are used in an indicator variable and what do they “indicate”?
- How should an indicator variable be named?
- How many indicator variables are required in an IVR?
- How is a reference group identified from the indicator variables?
- How does R define the reference group?
- What interaction variables are used in an IVR?
- How many interaction variables are required in an IVR?
- What is the purpose of including interaction variables in an IVR?
- How will an interaction effect look compared to no interaction effect when plotting the linear regressions separately for each group?
- [Optional] What questions do you have from this reading that you would like me to address? [Please be as specific as possible. Don't just say "everything" or "I don't understand anything." Of course, you can ask me questions about the reading before class on MS Teams.]