Multilevel Models Part 1: Do I Need a Multilevel Model?

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If you have data where the observations are not independent due to nesting or clustering, you may need a multilevel model. Another scenario that would require a multilevel model is if you have data where observations have been gathered multiple times on the same subject (a.k.a., longitudinal data or repeated […]

This post was kindly contributed by The SAS Training Post - go there to comment and to read the full post.