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The true distribution is then approximated by a linear regression, and the best estimators are obtained in closed form as ^ = ((~) ~) (~) (¯), where denotes the template matrix with the values of the known or previously determined model for any of the reference values β, are the random variables (e.g. a measurement), and the matrix ~ and the ...
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A model with exactly one explanatory variable is a simple linear regression; a model with two or more explanatory variables is a multiple linear regression. [1] This term is distinct from multivariate linear regression , which predicts multiple correlated dependent variables rather than a single dependent variable.
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Best linear unbiased predictions are similar to empirical Bayes estimates of random effects in linear mixed models, except that in the latter case, where weights depend on unknown values of components of variance, these unknown variances are replaced by sample-based estimates.