Dear list, this one is probably already answered somewhere, but to the best
of my efforts I did not find precisely the information I am looking for,
although I did find a lot of useful comments about the overall subject.

So, what I wanna do is the usual procedure of calculating CIs for the
coefficients at the grouping levels, i.e. the ones extracted with
coef(model) , which are the same as ranef(model) + fixef(model).

I found the explanation on the FAQ on how to extract the standard errors
for the conditional means with ranef(model, condVar = TRUE), but I still
don't know what would be the best practice here for using those to
calculate CIs. The FAQ does not seem to discuss that particular issue.

I know that functions such as dotplot and coefplot2 give me intervals, but
seems to me as a rather naīve way of calculating those. Please, is there
any suggestions you could make on how to accomplish that, i.e. how to
calculate CIs for the conditional coef(model) coefficients, by using the
standard errors extracted with condVar=TRUE?

Thanks for your time.

Richard

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