why does r use uncertainty why is it difficult to incorporate uncertainty in random effects when making predictions from mixed models? why is it difficult to incorporate uncertainty in random effects when making predictions from mixed models why is it difficult to incorporate uncertainty in random effects when making predictions why is uncertainty difficult to incorporate when making random effects when making predictions from mixed models why is it difficult to incorporate uncertainty in random effects when making predictions from mixed models why is uncertainty difficult to incorporate when making predictions? why is r sig difficult to incorporate uncertainty in random effects when making predictions why is it difficult to incorporate uncertainty in random effects when making predictions? what is lme4 used for? what is r sig why is it difficult to incorporate uncertainty in random effects when making predictions from mixed models in a frequentist setting why is it difficult to incorporate uncertainty in variance why is it difficult to incorporate uncertainty in the variance parameters why is it difficult to incorporate uncertainty in random effects when making predictions why is it difficult to incorporate uncertainty in random effects when making predictions from mixed models? what is confidence interval in r what is lme4 what is the purpose of the r-sig test for predicting uncertainty why are uncertainty intervals difficult to incorporate in random effect?