[R] How to obtain prediction intervals for random effects?

Petar Milin pmilin at ff.uns.ac.rs
Fri Nov 12 22:34:28 CET 2010

I wonder how can one get upper and lower limits of a prediction interval 
-- exact values? They are shown on caterpillar plot using ranef() with 
argument postVar=TRUE, but I would like to know them. A while ago, some 
discussions were opened on "Confidence Intervals for Random Effect 
BLUP's", but the answer was never clear:


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