Q31. Assume that I standardized my data, my question is, at what point of time should we re-scale standardized values to normal?
Is it after model completes its learning (i.e. after invocation of .fit(X_train, y_train)) ?
Is it after predicting values from the standardized data (i.e. after invocation of .pred(X_test)) ?
Is it after calculating RMSE with X_test & y_pred_test ?
We need to do an inverse transformation after predicting the X_test.
Do inverse transformation on both y_preds and y_test and then you can calculate RMSE.