data-beets Sugar beets data data-budworm budworm data get_ddf_Lb Adjusted denomintor degress freedom for linear estimate for linear mixed model. getkr Extract (or "get") components from a 'KRmodcomp' object. internal Internal functions for the pbkrtest package internal-pbkrtest pbkrtest internal kr-modcomp F-test and degrees of freedom based on Kenward-Roger approximation kr-vcov Ajusted covariance matrix for linear mixed models according to Kenward and Roger model-coerce Conversion between a model object and a restriction matrix pb-modcomp Model comparison using parametric bootstrap methods. pb-refdist Calculate reference distribution using parametric bootstrap sat-modcomp F-test and degrees of freedom based on Satterthwaite approximation