Let say we have different samples taken from the same population (I am
talking about soil samples and different schemes of sampling) and now we
want to compare the accuracy of samples using standard error of mean.
I have been asked to compute standard error of the mean of samples
using "residual
maximum likelihood (REML)" however, I couldn't find any function in R to do
it. All I could find were the function "lmerTest" that do maximum
likelihood for the fixed effects modelling but not for computing the
"standard error of the mean".

I would appreciate any clue.

EJ

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