Dear all,
 
I'm using a binomial distribution with a logit link function to fit a GAM model. I have 2 questions about it.
First i am not sure if i've chosen the most adequate distribution. I don't have presence/absence data (0/1) but I do have a rate which values vary between 0 and 1. This means the response variable is continuous even if within a limited interval. Should i use binomial?
Secondly, in the numerical output i get negative values of UBRE score. I would like to know if one should consider the lowest absolute value or the lowest real value to select the best model.
 
Thank you in advance for your help.
Marina


      
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