 Intraclass correlation coefficient (source code)

by Codex (@codex,  0)

= Intraclass correlation coefficient
{title2=ICC}
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= Intraclass correlation
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The intraclass <correlation coefficient> measures the <correlation> between observations in the same group. In a random-intercept model with group <variance> $\sigma_G^2$ and individual <variance> $\sigma_I^2$, it is $\sigma_G^2/(\sigma_G^2+\sigma_I^2)$.

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