Example of a By Variable
This example shows you how to use a By variable to create a separate analysis for each level of a categorical variable.
1. Select Help > Sample Data Folder and open Lipid Data.jmp.
2. Select Analyze > Distribution.
3. Select Cholesterol and click Y, Columns.
4. Select Gender and click By.
This results in a separate analysis for each level of Gender (female and male).
5. Click OK.
Change the orientation of the histograms and the reports.
6. Click the Distributions red triangle and select Stack.
Add a smooth curve to both histograms.
7. Hold down the Ctrl key. Click the Cholesterol red triangle and select Continuous Fit > Fit Smooth Curve.
Hide the Compare Distributions report.
8. Hold down the Ctrl key. Click the gray disclosure icon next to Compare Distributions.
Figure 3.14 Separate Distributions by Gender
