**I. Preliminaries**

A. Discussion of First ExamB. Details about Term PaperC. Overview of Part Two

A. Dependent Variables

1. Multiple Regression2. Discriminant Analysis3. Logistic Regression

1. Single Categorical Variable

a. Dichotomous: Dummy Variable Codingb. Polytomous: Dummy, Effect, and Orthogonal Coding

a. Dummy Codingb. Significance Tests: Orthogonal versus Nonorthogonal Categories

a. Definition and Interpretationb. Significance Tests

**III. Multiplicative Functions**

A. Interaction Effects

1. Three Types

a. Nominal X Nominal (i.e., Qualitative X Qualitative or Categorical X Categorical)b. Nominal X Numerical (i.e., Qualitative X Quantitative or Categorical X Continuous)c. Numerical X Numerical (i.e., Quantitative X Quantitative or Continuous X Continuous)

a. Multicollinearityb. Significance Testsc. Interpretation: What does "control" mean with multiplicative terms in the equation?

1. Multiplicative Terms in a Single Numerical Variable

a. Quadratic Functionsb. Higher-Order Polynomial Functions

a. Multicollinearityb. Confounding Curvilinear and Interaction Effectsc. Alternatives to Polynomial Functions

1. Nonadditive Nonlinear Causal Effects2. Precautions

A. OutliersB. Violated AssumptionsC. Missing Data

**V. Review and Exam II**

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