[R] residual s.e. by group in mixed model

Irene Mantzouni ima at difres.dk
Mon Oct 15 19:14:26 CEST 2007

Hi all!
I would like to extract the residual standard error by group in a lme() model...
Is there a direct method?
Also, a rather statistical question;
I need to estimate the standard error of the mean(residuals) in a model..is this the same as the residual s.e.?
Thank you!!

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