Residual Normal QQ Plot
A normal quantile-quantile plot of residuals is illustrated
by the plot on the right in Figure 39.25.
See the "Residual Normal Quantiles" section
for an explanation of the X axis variable.
The empirical quantiles are plotted against the
quantiles of a standard normal distribution.
If the residuals are from a normal distribution
with mean 0, the points tend to fall along the
reference line that has an intercept of 0 and a
slope equal to the estimated standard deviation.
Copyright © 1999 by SAS Institute Inc., Cary, NC, USA. All rights reserved.