Glossary of Statistical Terms: Definition Root mean squared error

The Root Mean Squared Error (RMSE) is an important statistical calculation used to determine the difference between predicted values in a model and actual values from observations. If this difference is large the model is likely to be less accurate than if the difference is small; therefore, a modeler can calculate the RMSE and adjust other features until the RMSE is as small as possible to improve the model.

Please note that the definitions in our statistics encyclopedia are simplified explanations of terms. Our goal is to make the definitions accessible for a broad audience; thus it is possible that some definitions do not adhere entirely to scientific standards.

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