b) Define mean absolute error and percentage
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mean abolute error is the average or mean of all the values minus the average error in all of them
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The Mean Absolute Percentage Error (Mape) Is A Measure Of How Accurate A Forecast System Is. It Measures This Accuracy As A Percentage, And Can Be Calculated As The Average Absolute Percent Error For Each Time Period Minus Actual Values Divided By Actual Values.
Percentage Is A Number Or Ratio Expressed As A Fraction Of 100. It Is Often Denoted Using The Percent Sign, "%", Although The Abbreviations "Pct.", "Pct" And Sometimes "Pc" Are Also Used. A Percentage Is A Dimensionless Number; It Has No Unit Of Measurement..
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