SAS for Mixed Models

Chapter 1: Mixed Model Basics

1.1 Introduction. 1

1.2 Statistical Models. 2

1.2.1 Simple Example with Two Treatments. 2

1.2.2 Model Characteristics. 2

1.2.3 Models with Subsampling. 3

1.2.4 Experimental Units. 4

1.2.5 Simple Hierarchical Design. 5

1.3 Forms of Linear Predictors. 6

1.4 Fixed and Random Effects. 8

1.5 Mixed Models. 9

1.6 Typical Studies and Modeling Issues That Arise. 10

1.6.1 Random Effects Model 10

1.6.2 Multi-location Example. 11

1.6.3 Repeated Measures and Split-Plot Experiments. 12

1.6.4 Fixed Treatment, Random Block, Non-normal (Binomial) Data Example. 13

1.6.5 Repeated Measures with Non-normal (Count) Data. 13

1.6.6 Repeated Measures and Split Plots with Nonlinear Effects. 13

1.7 A Typology for Mixed Models. 15

1.8 Flowcharts ...