The Evaluation metric is RMSE. This rewards you for getting close to the true answer (and penalizes being very far away).

Submission Format

For every id in the test dataset, your answer submission file should have only two columns: id and price2013. The price2013 should reflect the prediction based on the information from that id in the house_test.csv file.

The file should contain a header and have the following format:

id,prediction
6,265600
13,79900
20,332000
30,98700
37,266100
67,198300
etc.