I’m brand new to sas and funding it hard to get the results I’m wanting.
Using multivariate regression I have decided to model total volume by subgroups of brand.
Im using sas studio to do this but have never done this analysis by subgroups before only by category as a whole. Is there any difference?
looking at my results the parameter estimates tables has 6 rows, intercept,unit,price,brand 1,2 and 3 however brand 3 has a 0 degree of freedom which is making me think my method isn’t correct. Any advices would be great thank you!
My code:
proc glmselect data=MS3S30.MARKET1 outdesign(addinputvars)=Work.reg_design;
class brand_id / param=glm;
model volume=units price brand_id / showpvalues selection=none;
run;
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