what’s new in design-expert version 7 general improvements pat whitcomb march 24, 2006
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Design-Expert version 7 1
What’s New inDesign-Expert version 7General Improvements
Pat WhitcombMarch 24, 2006
Design-Expert version 7 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
Design-Expert version 7 3
Design Evaluation
User specifies what order terms to ignore.
Can evaluate by design or response.
New options for more flexibility. User specifies ratios for power calculation. User specifies what to report. User specified options for standard error plots.
Annotation added to design evaluation report.
Design-Expert version 7 4
Design Evaluation Specify Order of Terms to Ignore
Focus attention on what is most
important.
Design-Expert version 7 5
Design Evaluation Evaluate by Design or Response
Useful when a response has missing data.
Design-Expert version 7 6
Design Evaluation New Options for More Flexibility
User specifies ratios for power calculation.
User specifies what to report.
User specified options for standard error plots.
Design-Expert version 7 7
Design EvaluationAnnotated Design Evaluation Report
Design-Expert version 7 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
Design-Expert version 7 9
Diagnostics Diagnostics Tool has Two Sets of Buttons
ei = residuali
Design-Expert version 7 10
DiagnosticsExact Limits
Design-Expert® SoftwareConversion
Color points by value ofConversion:
97.0
51.0
Run Number
Ext
erna
lly S
tude
ntiz
ed R
esid
uals
Externally Studentized Residuals
-4.33
-2.17
0.00
2.17
4.33
1 4 7 10 13 16 19
t(/n, n-p'-1) p' is the number of model terms including the interceptn is the total number of runs
Design-Expert version 7 11
Diagnostics DFFITS
DFFITS measures the influence the ith observation 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.
Run Number
DFF
ITS
DFFITS vs. Run
-2.15
-1.11
-0.07
0.96
2.00
1 4 7 10 13 16 19
Design-Expert version 7 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 DFBETAS j,i is the number of standard errors that the jth coefficient changes if the ith observation is removed.
Run Number
DFB
ETA
S fo
r Int
erce
pt
DFBETAS for Intercept vs. Run
-2.00
-1.00
0.00
1.00
2.00
1 4 7 10 13 16 19
Run Number
DFB
ETA
S fo
r A
DFBETAS for A vs. Run
-2.00
-1.00
0.00
1.00
2.00
1 4 7 10 13 16 19
Design-Expert version 7 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.
Design-Expert version 7 14
New Color by Option
Design-Expert® SoftwareConversion
Color points by value ofConversion:
97.0
51.0
Internally Studentized Residuals
Nor
mal
% P
roba
bilit
y
Normal Plot of Residuals
-1.39 -0.51 0.36 1.23 2.10
1
5
10
20
30
50
70
80
90
95
99
Design-Expert version 7 15
Full Color Contour and 3D Plots
A: Water5.000
B: Alcohol4.000
C: Urea4.000
2.000 2.000
3.000
Turbidity
517.398
626.122734.847
843.571
952.296
22
22 22
22
Design-Expert version 7 16
Design Points on 3D Plots
A (5.000)B (2.000)
C (4.000)
300 400 500
600
700 800
900 1000
1100
1200
Tur
bidi
ty
A (3.000)
B (4.000)
C (2.000)
Design-Expert version 7 17
Grid lines on contour plots
40.00 42.50 45.00 47.50 50.00
80.00
82.50
85.00
87.50
90.00Conversion
A: time
B: t
empe
ratu
re
78.0
80.0
80.0
82.0
84.0
86.0
88.0
666666
A: Water
B: AlcoholC: Urea
Turbidity
5.000
4.000
4.000
4.500
3.500
3.500
4.000
3.000
3.000
3.500
2.500
2.500
3.000
2.000
2.000
500
600
700
800
900
1000
22
22 22
22
Design-Expert version 7 18
Cross Hairs
Design-Expert version 7 19
Magnification on Contour Plots
A: TEA-LS28.000
B: Cocamide9.000
C: Lauramide9.000
1.000 1.000
20.000
Height
140
150
160
160
160
170
175
22
22
22
22
22
Height
A: TEA-LS26.105
B: Cocamide6.283
C: Lauramide4.877
1.000 1.000
22.868
160
160
170
170
175
22
22
Design-Expert version 7 20
Specify Detail on Contour “Flags”
40.00 42.50 45.00 47.50 50.00
80.00
82.50
85.00
87.50
90.00Conversion
A: time
B: t
empe
ratu
re
78.0
80.0
80.0
82.0
84.0
86.0
88.0
666666
Prediction 81.6Observed 81.095% CI Lo 77.895% CI Hig 85.495% PI Lo 71.695% PI Hig 91.6SE Mean 1.68337SE Pred 4.43914X1 45.00X2 85.00
Design-Expert version 7 21
“LSD Bars” & “Confidence Bands”
0.00 10.00 20.00 30.00 40.00
29
35.25
41.5
47.75
54
A: Departure
Driv
e tim
e
One Factor
22
0.00 10.00 20.00 30.00 40.00
29
35.25
41.5
47.75
54
A: Departure
Driv
e tim
e
One Factor
22
Design-Expert version 7 22
Better Help
Improved help
Screen tips
Movies (mini tutorials)
Design-Expert version 7 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.
Design-Expert version 7 24
Graph Columns Node
Design-Expert version 7 25
Highlight Points
Run Number
DFB
ETA
S fo
r C
DFBETAS for C vs. Run
-2.00
-0.27
1.46
3.20
4.93
1 6 11 16 21 26 31
Design-Expert version 7 26
Sort by Row Statusright click in the upper left hand corner
Design-Expert version 7 27
Ignore Response Cells
Design-Expert version 7 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.
Design-Expert version 7 29
Numerical optimization results carried over to graphical optimization and point prediction.
Design-Expert version 7 30
Export Graphs as Enhanced Metafile“File” “Export Graph to file...”
Design-Expert version 7 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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