1.
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2.
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Select Analyze > Fit Model.
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3.
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Click Run.
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4.
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From the red triangle menu next to Loglinear Variance Fit, select Save Columns > Residuals.
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5.
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In the InjectionMolding.jmp sample data table, right-click on the continuous icon next to Hold Time in the Columns panel, and select Nominal.
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6.
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Select Analyze > Fit Y by X.
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7.
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8.
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9.
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Click OK.
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Figure 10.6 Residual by Dispersion Effect
In this plot it is easy to see the variance go up as the Hold Time increases. This is done by treating Hold Time as a nominal factor.