I'm not sure if this is what you need, but here goes an example in mtcars DF:

model_baseline

Thanks Joan.

I used the LRtest before

I was sure this was the way, but I was asked to specifically do a "goodness of fit" test for ANOVA.

I am confused, I do not know what I am exactly looking for...

For me, what you suggest is totallu right.

Thanks again

https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.investopedia.com/terms/g/goodness-of-fit.asp&ved=2ahUKEwi3m9CXto3xAhUO3aQKHZQIAVAQFjACegQIGhAF&usg=AOvVaw0QvUzcp07C0JgRNCqqgpql