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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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.