Linear regression example in 2nd Edition book using unprocessed training data

It appears that the data used to test the trained linear regression model on page 75 of the 2nd edition of "Hands-on..." is using the unprocessed `housing` data frame. If the model was trained with `housing_prepared` shouldn't the examples (i.e. `some_data=housing.iloc[:5]`) use the processed data set as well (i.e. some_data=housing_prepared[:5])?