4
Denition of Mixed Models by their component
eects
1. Mixed Models contain both xed
and random eects
2. Fixed Eects: factors for which the
only levels under consideration are
contained in the coding of those
eects
3. Random Eects: Factors for which
the levels contained in the coding
of those factors are a random
sample of the total number of levels
in the population for that factor.
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