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.
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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.
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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.
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Figure 11.5 Contrast Specification Window
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Click Done.
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Figure 11.6 Contrast Report
