A number characterizing the model prediction quality ( goodness of fit ) between the datasets of a given variable x and its estimator \hat x :
(1) | {\rm APE} = \frac{100 %}{N} \, \sum_{k = 1}^N \frac{\hat x_k - x_k}{x_k} |
See also
Formal science / Mathematics / Statistics
Natural Science / System / Model
[ Root Mean Square Deviation (RMSD)] = [ Root Mean Square Error (RMSE) ]