## Metric
Submissions are evaluated on [Root-Mean-Squared-Error (RMSE) ](https://en.wikipedia.org/wiki/Root-mean-square_deviation)between the logarithm of the predicted value and the logarithm of the observed sales price. (Taking logs means that errors in predicting expensive houses and cheap houses will affect the result equally.)

## Submission File Format
The file should contain a header and have the following format:
```
Id,SalePrice
1758,11011.1
1759,19011.3
1760,91111.4
etc.
```
You can download an example submission file (sample_submission.csv) on the Data page.