# Statistics: Effects plots: some properties in multilevel analysis

### From MathWiki

This page explores issues in using effects plots for multilevel data.

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## Interpretations of effects plot in unilevel data

The construction of confidence bands in effects plots rests on the duality between *beta* space in which lives the confidence ellipsoid for estimated coefficients and *data* space in which we plot the regression surface or sections of it.

For a linear model with

sin(*x*)