ABSTRACT
The overlay plot shown in Figure 8.1 indicates that the model fits the data reasonably well, the data points are scattered randomly about the regression line and there are no obvious outliers. Look for plotted points, #, being some distance from the main cluster of other points, or for points that are distant from the fitted regression line (plotted by *). The normal probability plot (see Figure 8.2) indicates that the residuals are reasonably normal (see Chapter 5 for interpretation of normal probability plots).
