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What’s New in Design-Expert version 7 General Improvements Pat Whitcomb March 24, 2006

What’s New in Design-Expert version 7 General Improvements Pat Whitcomb March 24, 2006. What’s New. General improvements Design evaluation Diagnostics Updated graphics Better help Miscellaneous cool new stuff Factorial design and analysis Response surface design

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What’s New in Design-Expert version 7 General Improvements Pat Whitcomb March 24, 2006

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  1. What’s New inDesign-Expert version 7General ImprovementsPat WhitcombMarch 24, 2006

  2. What’s New • General improvements • Design evaluation • Diagnostics • Updated graphics • Better help • Miscellaneous cool new stuff • Factorial design and analysis • Response surface design • Mixture design and analysis • Combined design and analysis

  3. Design Evaluation • User specifies what order terms to ignore. • Can evaluate by design or response. • New options for more flexibility. • User specifies D/s ratios for power calculation. • User specifies what to report. • User specified options for standard error plots. • Annotation added to design evaluation report.

  4. Design Evaluation Specify Order of Terms to Ignore Focus attention on what is most important.

  5. Design Evaluation Evaluate by Design or Response Useful when a response has missing data.

  6. Design Evaluation New Options for More Flexibility • User specifies D/s ratios for power calculation. • User specifies what to report. • User specified options for standard error plots.

  7. Design EvaluationAnnotated Design Evaluation Report

  8. Diagnostics • Diagnostics Tool has two sets of buttons: • “Diagnostics” and “Influence”. • New names and limits. • Internally studentized residual = studentized residual v6. • Externally studentized residual = outlier t v6. • The externally studentized residual has exact limits. • New – DFFITS • New – DFBETAS

  9. DiagnosticsDiagnostics Tool has Two Sets of Buttons ei = residuali

  10. DiagnosticsExact Limits t(a/n, n-p'-1) p' is the number of model terms including the interceptn is the total number of runs

  11. Diagnostics DFFITS DFFITS measures the influence the ithobservation has on the predicted value.(See Myers, Raymond: “Classical andModern Regression with Applications”,1986, Duxbury Press, page 284.) It isthe studentized difference between thepredicted value with observation i andthe predicted value without observation i. DFFITS is the externally studentized residual magnified by high leverage points and shrunk by low leverage points. It is a sensitive test for influence and points outside the limits are not necessarily bad just influential. These runs associated with points outside the limits should be investigated to for potential problems. DFFITS is very sensitive and it is not surprising to have a point or two falling outside the limits, especially for small designs.

  12. Diagnostics DFBETAS DFBETAS measures the influence the ith observation has on each regression coefficient. (See Myers, Raymond: “Classical and Modern Regression with Applications”, 1986, Duxbury Press, page 284.) The DFBETASj,i is the number of standard errors that the jth coefficient changes if the ith observation is removed.

  13. Updated Graphics • New color by option. • Full color contour and 3D plots. • Design points and their projection lines added to 3D plots. • Grid lines on contour plots. • Cross hairs read coordinates on plots. • Magnification on contour plots. • User specified detail on contour “Flags”. • Choice of “LSD Bars”, “Confidence Bands” or “None” on one factor and interaction plots.

  14. New Color by Option

  15. Full Color Contour and 3D Plots

  16. Design Points on 3D Plots

  17. Grid lines on contour plots

  18. Cross Hairs

  19. Magnification on Contour Plots

  20. Specify Detail on Contour “Flags”

  21. “LSD Bars” & “Confidence Bands”

  22. Better Help • Improved help • Screen tips • Movies (mini tutorials)

  23. Miscellaneous Cool New Stuff • “Graph Columns” now has its own node. • Highlight points in the design layout or on a diagnostic graph for easy identification. • Right click and response cell and ignore it. • Improved design summary. • Numerical optimization results now carried over to graphical optimization and point prediction. • Export graph to enhanced metafile (*.emf). • Exporting to other software packages.

  24. Graph Columns Node

  25. Highlight Points

  26. Sort by Row Statusright click in the upper left hand corner

  27. Ignore Response Cells

  28. Improved Design Summary • New in version 7: • Means and standard deviations for factors and responses. • The ratio of maximum to minimum added for responses.

  29. Numerical optimization results carried over to graphical optimization and point prediction.

  30. Export Graphs as Enhanced Metafile“File” “Export Graph to file...”

  31. Save and Export • Save as: • Design-Expert version 6 file (*.dx6) • XML Document (*.xml) • VarTran file (*.vat) • Export: • “Export Design to file...” → text file (*.txt) • “Export Design to AAO file...” → text file (*.txt)

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