The Actual Value of the Time Series at Time T $\frac { \sum _ { t = 1 } ^ { n } \left| \frac { A _ { t } + F _ { t } } { 2 } \right| } { n }$

question 8

Multiple Choice

The actual value of the time series at time t and the forecast value for time t is denoted by At and Ft respectively.What is the formula used for calculating the mean absolute percentage error over a range of forecasted values?

• A)MAPE = \(\frac { \sum _ { t = 1 } ^ { n } \left| \frac { A _ { t } + F _ { t } } { 2 } \right| } { n }\)
• B)MAPE = \(\sqrt { \frac { \sum _ { t = 1 } ^ { n } \left| \frac { A _ { t } + F _ { t } } { 2 } \right| } { n } }\)
• C)MAPE = \(\frac { \sum _ { t = 1 } ^ { n } \left| A _ { t } - F _ { t } \right| } { n }\)
• D)MAPE = \(\frac { \sum _ { t = 1 } ^ { n } \left| \frac { A _ { t } + F _ { t } } { A _ { t } } \right| } { n }\) × 100

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