LISA (Laboratory for Interdisciplinary Statistical Analysis) provided a series of evening short courses to help graduate students use statistics in their research. The focus of these two-hour courses was on teaching practical statistical techniques for analyzing or collecting data.

July 23, 2012
Fixed Effects, Random Effects, and Correlated Data
Instructor: Nels Johnson

The main focus of this course will be on linear mixed models. That is, linear models with fixed effects and random effects. Some topics we’ll discuss are: When would I want to use a random effect? How does estimation change for random versus fixed effects? How does inference change for random versus fixed effects? How are random effects related to correlated data? Examples in SAS will be provided.

Course files are available on the course webpage (

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