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Fixed and Random Factors in Mixed Models

with Karen Grace-Martin
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What is the difference between fixed and random factors in Mixed Models? This is one of the hardest parts of using mixed models–how to decide whether a factor should be fixed or random. And once you decide, which effects of those random factors should you include?

Covered in this webinar:

  1. The real difference between fixed and random factors
  2. Which predictors can be either fixed or random and which must always be fixed
  3. How we measure the effects of fixed and random factors, and what those effects mean
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