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Residual plots can be used to validate assumptions about the regression model. Figure 1: Residual plots are helpful in assessments of nonlinear trends and heteroscedasticity. A formal test of lack ...
R. Dennis Cook, Added-Variable Plots and Curvature in Linear Regression, Technometrics, Vol. 38, No. 3 (Aug., 1996), pp. 275-278. ... Added-variable plots are useful for a variety of data-analytic ...
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