 Mean percentage error

In statistics, the mean percentage error (MPE) is the computed average of percentage errors by which estimated forecasts differ from actual values of the quantity being forecast.
Formula for mean percentage error calculation is:
where a_{t} is the actual value of the quantity being forecast, and f_{t} is the forecast.
See also
 Percentage error
 Mean squared error
 Mean squared prediction error
 Minimum meansquare error
 Squared deviations
 Peak signaltonoise ratio
 Root mean square deviation
 Errors and residuals in statistics
References
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