Nevertheless, the accuracy of the prediction US for US is indicated by the q ratio: The definitions 2and 6and the equality (4) lead to the equality which shows that as soon as US > US 0 2 the prediction for the normalized values is (usually by a large margin) not as good as the prediction for the unnormalized values.
after predicting the normalized user-satisfaction values, these values should be transformed back to the original scale to guarantee more accurate predictions.