Modeling and Multivariate Methods - SAS

76 Fitting Standard Least Squares Models Chapter 3
Estimates
Power Options
Power options are available only for continuous-response models. Power and other test details are available
in the following contexts:
• If you want the 0.05 level details for all parameter estimates, select Estimates > Parameter Power from
the report’s red triangle menu. This option produces the LSV, LSN, and adjusted power for an alpha of
0.05 for each parameter in the linear model.
• If you want the details for an F-test for a certain effect, select Power Analysis from the effect’s red
triangle menu.
• If you want the details for a Contrast, create the contrast and then select Power Analysis from the
effect’s red triangle menu.
• If you want the details for a custom test, create the test that you want with the Custom Test option
from the platform popup menu and then select Power Analysis option in the popup menu next to the
Custom Test.
In all cases except the first, you enter information in the Power Details window for the calculations that you
want.
Example of Power Analysis
The Power Details window (Figure 3.17) shows the contexts and options for test detailing. After you fill in
the values, the results are added to the end of the report.
1. Open the Big Class.jmp sample data table.
2. Select Analyze > Fit Model.
3. Select weight and click Y.
4. Add age, sex, and height as the effects.
5. Click Run.
6. From the red triangle next to age, select Power Analysis.
Figure 3.17 Power Details Window