The Root Mean Square Error (RMSE) scores at both the tweet-level and zip code-level for all models, along with the average of the 5-fold cross-validated RMSE scores for the predictive models.

Models specified with (*) do not include any zip code-level features. The other models include all zip code-level features, in addition to text. The RMSE scores for the predictive models, with and without sentiment as a feature, are reported as without sentiment / with sentiment. Cross-validation is not applicable for baseline models.

带(*)标记的模型未包含任何邮政编码层级特征（zip code-level features）。其余模型除文本特征外，还纳入了全部邮政编码层级特征。本次报告的预测模型均方根误差（Root Mean Square Error, RMSE）得分，以「无情感特征 / 含情感特征」的形式呈现。基线模型不适用交叉验证。