Analyze Factorial Design

Residual Plots - Residuals versus Fits

This graph plots the residuals versus the fits. The residuals should be scattered randomly about zero. Use this plot to look for the following:

This pattern...	Indicates...
Fanning or uneven spreading of residuals across fitted values	Nonconstant variance
Curvilinear	A missing higher-order term
A point far away from zero	An outlier

$image\facar_3n.gif$

Based on this plot, the residuals appear to be randomly scattered about zero. No evidence of nonconstant variance, missing terms, or outliers exists.