Fitting Linear Mixed-Effects Models using lme4

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1.1. Linear mixed models Just as a linear model is described by the distribution of a vector-valued random response variable, Y, whose observed value is y obs, a linear mixed model is described by the distribution of two vector-valued random variables: Y, the response, and B, the vector of random effects.

  Linear, Model, Mixed, Effect, Random, Mixed linear, Effects models, Linear mixed models