I am in the last stage of my paper review and it is very close to getting submitted. However, there is a comment I am highly struggling with:
The reviewer wants to know what the ICC and the s.e. of the ICC is.
The model I have is a linear mixed effect model looking like:
mixedmodel <- lmer(y ~ x1 + x2 + x3 + (1 | countries), weights=weight, Alldata)
Before I had never heard about the ICC. When looking for documentation, I do find information on ICC, but not on how to calculate the s.e. of the ICC.
Can anyone please help me with this? I am using R.