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How to check if the regression model fits the data well?

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There are a couple of metrics that you can use:

  1. R-squared/Adjusted R-squared: Relative measure of fit. This was explained in a previous answer
  2. F1 Score: Evaluates the null hypothesis that all regression coefficients are equal to zero vs the alternative hypothesis that at least one doesn’t equal zero
  3. RMSE: Absolute measure of fit.

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