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  1. O

    checking assumptions

    Hi, thank you for your reply, my indipendent variable is a mesure of public investments. It has a large variance: summary(dataset$INVESTIMENTI) Min. 1st Qu. Median Mean 3rd Qu. Max. 0 162093 401503 1125314 916409 449526635 I attach the residual plots zoomed
  2. O

    checking assumptions

    Thank you for your answer, I suspect eteroschedasticity as well. I'm going to do some further tests and think over the possibility of introducing some other variable... I also considered the idea of cutting the distribution in order to exclude the most extreme outliers but I am not sure whether...
  3. O

    checking assumptions

    Hi, I am not really able to understand whether the basic assumptions of linear regression are met (I'm kind of a novice). I have a dataset that is big enough (as far as I understand), a series of significants coefficients (both individually and togheter) and an adjusted R-squared over 0.9...