I have been using the `Root Mean Squared Error`

(RMSE) to measure the accuracy of values predicted using a model. I understand that the value returned is using the units of my measures (rather than a percentage). However, I would like to quote my values as a percentage. The approach that I have taken is to normalize the `RMSE`

by the mean value of my observations.

Is there a term for `RMSE/mean`

?

## Best Answer

Yes, it is called the

coefficient of variation. See this question for some discussion about this parameter, or read the Wikipedia entry.