what is non convergence how to use weights in mixed effect model how to get residual variance in mixed effect model how to use r weights how to get residual variance from lme equation is there a weight for r in lme non convergence mixed effect which of the following statements represents a nonconvergent linear mixed effect model? how to make r weights variable linear what kind of model is used to calculate residual variance what is the difference between a heteroscedastic mixed effect and an approximate residual? why is a non-convergent model when using the weights command, I find the residual variance how to use a nonconvergent mixed-effects model which of the following variables is a nonconverging mixed-effects model? why use weights what is residual variance in mixed effects model what is the difference between heteroscedastic linear mixed effect model and non converging linear mixed effect model how to estimate residual variance how do you make the weighting model nonconvergent