GLM models can be used also to assess the relation among a variables, using average values (previously calculated) of each variable itself?

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David Eugene Booth

You introduce a lot of problems this way because you don't see the original variability in the data which is always very important in data analysis. I can't recommend this procedure. Best wishes, David Booth

Marcello Franchini

Dear Dr. Booth,

Many thanks for your clear and informative e-mail! I wish you a good summer.

Kind regards

Dear Dr. Signorelli,

Many thanks for the answer.