This example continues the crab satellite example in Example of a Generalized Linear Model. Suppose that you want to test whether female crabs with good spines attracted a different number of male crabs (satellites) than female crabs with worn or broken spines.
Click the red triangle next to Generalized Linear Model Fit and select Contrast. The Select Contrast Effect options appear at the bottom of the report window.
Select spine, the variable of interest, and click Go.
To compare the crabs with good spines to crabs with worn or broken spines, click the + button beside Both Good and the - button beside both One Worn/Broken and Both Worn/Broken.
Contrast Specification Window
Click Done.
Contrast Report

Help created on 9/19/2017