A residual plot charts these values against the first variable to visually display the effectiveness of the equation. How to Use Microsoft Excel to Draw Control Charts and Graphs. A control chart ...

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 ...

Residual plots provide visual displays for assessing how well the model fits the data, for evaluating the distribution of the residuals, and for identifying influential observations. Surface plots are ...