Mixed Effects Model Power Calculations
On Ti, 2005-08-16, 21:17, rab45+ at pitt.edu skrev:
Is there an R package available that would facilitate doing a power/sample size analysis for linear mixed effects models?
I'm not aware of such a package (others might be...). When it comes to sample size calculations, especially for tricky designs and/or advanced methodology, simulation is usually the best approach. An example using `lme' can be found at http://maven.smith.edu/~nhorton/R/ HTH, Henric
I have seen the Java applets made available by Russell Length which would seem to be able to handle most any lme, but there is little documentation and it's not clear how the models need to be formulated. Rick B.
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