02-16-2016 04:54 PM
I am analyzing data from a randomized block design study. We have two independent variables, two covariate and one blocking factor (categorical). As I use a block design, I wonder what is a proper way to set up an ANCOVA model (Linear Model function) in SAS EG to take into account the blocking factor? Do I just add one more factor in the classification variable option in Linear Model and turn off (set to "False") the "class effects to use" in the Post Hoc Tests - Least Squares tab?
02-17-2016 07:35 PM
I'm not a statistician but I'm told that our Linear Models task doesn't completely support ANCOVA out of the box. You might be able to use custom code in the task (use the Code Preview and you can add items at certain points) to add the options/statements you need.
As far as ANCOVA approach, you might want to ask in the Statistical Procedures board.
02-17-2016 09:57 PM
As an extension to Chris's note, it's really easy to add custom code to EG tasks. Don't hesitate to give it a try, and post questions if you have problems!