Figure 4.4 Column Selection Panel for Iris.jmp with a Validation Set
The values for F Ratio and Prob>F given in the Stepwise report are the F ratio and p-value for the analysis of covariance test for the group variable. The analysis of covariance test for the group variable is an indicator of its discriminatory power relative to the covariate under consideration.
Smallest p-value among the p-values for all covariates available to enter the model.
Largest p-value among the p-values for all covariates currently selected for entry into the model.
See Entropy RSquare. Available only if a validation set is used.
Tip: After you click Apply this Model, the columns that you select appear at the top of the Score Summaries report.
If you enter a covariate and then select Lock for that covariate, it remains in the model regardless of selections made using the control buttons. The Entered box for the locked covariate shows a dimmed check mark to indicate that it is in the model.
If you select Lock for a covariate that is not Entered, it is not entered into the model regardless of selections made using the control buttons.
F ratio for a test for the group variable obtained using an analysis of covariance model. For details, see Updating the F Ratio and Prob>F.
p-value for a test for the group variable obtained using an analysis of covariance model. For details, see Updating the F Ratio and Prob>F.
1.
Select Help > Sample Data Library and open Iris.jmp.
2.
Select Analyze > Multivariate Methods > Discriminant.
3.
Select Sepal length, Sepal width, Petal length, and Petal width and click Y, Covariates.
4.
Select Species and click X, Categories.
5.
Select Stepwise Variable Selection.
6.
7.
Click Step Forward three times.
Figure 4.5 Stepped Model for Iris.jmp
8.
Click Apply This Model.
Figure 4.6 Score Summaries Report Showing Selected Covariates

Help created on 7/12/2018