Question

FORCASTING Three Weighted Moving Average (3WMA) = (0.10), (0. 20) (0.70) Compute: MAE, MSE, MAPE Month...

FORCASTING Three Weighted Moving Average (3WMA) = (0.10), (0. 20) (0.70) Compute:


MAE, MSE, MAPE

Month SALES
80 1

140    2

200    3

260 4

320    5

380 6

440 7

500    8

560 9

720    10




Math   Statistics-And-Probability   
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Homework Answers

Answer #1

Weighted average forecast x't = w1*xt-1+w2*xt+w3*xt+1

Month Sales Forecasts
1 80
2 140 176
3 200 236
4 260 296
5 320 356
6 380 416
7 440 476
8 500 536
9 560 666
10 720

excel formulas

Month Sales Forecasts Error Absolute error Square error Percentage error
1 80
2 140 176 -36 36 1296 25.71429
3 200 236 -36 36 1296 18
4 260 296 -36 36 1296 13.84615
5 320 356 -36 36 1296 11.25
6 380 416 -36 36 1296 9.473684
7 440 476 -36 36 1296 8.181818
8 500 536 -36 36 1296 7.2
9 560 666 -106 106 11236 18.92857
10 720
MAE = 44.75 MSE = 2538.5 MAPE = 14.07
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