Analyze Variability
Graphs - Residuals versus Fits
|
|
Analyze VariabilityGraphs - Residuals versus Fits |
|
This graph plots the log residuals versus the fitted values. 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 |
|
|
Curvilinear |
A missing higher-order term |
|
A point far away from zero |
An outlier |
Example Output |
|
Interpretation |
|
Based on this plot, the residuals appear to be randomly scattered about zero. No evidence of nonconstant variance, missing terms, or outliers exists.
| Minitab help | Stat | Graph | SixSigma | DOE | Glossary | Reliability | SPC,MSA,CPK | ||
|
|||||||||
