[R-sig-ME] SE and CI for ICC

Mohd Masood drmasoodmohd at gmail.com
Fri Sep 12 18:20:34 CEST 2014

I am using random intercept logistic model (in lme4) to calculated
Intraclass correlation coefficient (ICC). lme4 only provides point
estimates and standard deviation (not standard errors) of variance
point estimates can be used to calculated point estimates for ICC. The
problem is how can I calculate standard error and confidence interval for
ICC. I couldn't find any literature showing formula to calculate confidence
interval around ICC.  Or is it not possible to calculate SE and CI for ICC
due to skewed sampling distribution (Please see PMCID: PMC3426610).


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