Showthemodelmatrixfor12observationsandthreeexplanatoryvariables,thefirstofwhichis quantitative,thesecondisbinary,andthethirdhasthreecategories,suchthateachcombination of thecategoricalvariableshastwoobservations.

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Showthemodelmatrixfor12observationsandthreeexplanatoryvariables,thefirstofwhichis quantitative,thesecondisbinary,andthethirdhasthreecategories,suchthateachcombination of thecategoricalvariableshastwoobservations.

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