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Re: PSPP linear regression (reference category).

From: Jack Drew
Subject: Re: PSPP linear regression (reference category).
Date: Thu, 29 Sep 2016 10:58:30 -0400

Thanks for the speedy response, Alan.

To be clear: if memory serves SPSS lets you specify the reference value for a categorical variable.  So for a variable with 0/1/2 values, you can specify '0' as the reference category.

However, if I understand you correctly, the method for PSPP is to create a dummy variable (0/1) for each of the 0/1/2 values and then exclude the dummy variable for 0 as the reference group.  You can run additional models and swap out the remaining variables to change reference group.


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