Is level 2 variance significantly different from 0?

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kmbennett
Posts: 1
Joined: Sat Jan 18, 2020 1:53 pm

Is level 2 variance significantly different from 0?

Post by kmbennett »

How do you work out if level 2 variance (the U-part) is significantly different from zero in the 2 level random intercepts only model?
billb
Posts: 157
Joined: Fri May 21, 2010 1:21 pm

Re: Is level 2 variance significantly different from 0?

Post by billb »

That depends on which estimation method you are using but generally involves fitting the model with and without the random intercept and looking at some indicator of model fit - a LR test for ML methods or comparing DIC for MCMC. Suggest you look in the user guides for examples.
Bill.
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