Compute MAD , MSE , and MAPE for the following data, showing actual and forecasted numbers of accounts serviced.
[|Error| \div Actual] \times 100 | Error^2 | |Error| | (A ─ F) Error | Forecast | Actual | Period |
.92% | 4 | 2 | 2 | 215 | 217 | 1 ………………………….. |
1.41 | 9 | 3 | -3 | 216 | 213 | 2 ………………………….. |
.46 | 1 | 1 | 1 | 215 | 216 | 3 ………………………….. |
1.9 | 16 | 4 | -4 | 214 | 210 | 4 ………………………….. |
.94 | 4 | 2 | 2 | 211 | 213 | 5 ………………………….. |
2.28 | 25 | 5 | 5 | 214 | 219 | 6 ………………………….. |
0.46 | 1 | 1 | -1 | 217 | 216 | 7 ………………………….. |
\underset{10.26 \%}{\underline{1.89} } | \underset{76}{\underline{16} } | \underset{22}{\underline{4} } | \underset{-2}{\underline{-4} } | 216 | 212 | 8 ………………………….. |