ABSTRACT
The assumption of constant variance of errors is checked by plotting residuals against predicted values. The SAS code that produces the plot in Figure 8.3 is
The option/VREF places a reference line on the plot at zero.
The assumption of constant variance of errors is checked by plotting residuals against predicted values. The SAS code that produces the plot in Figure 8.3 is
The option/VREF places a reference line on the plot at zero.