Question: The observed sales for Week 1 Week 2 Week 3 and Week 4 are 27, 23, 28 and 24, respectively. The forecast for these weeks

The observed sales for Week 1 Week 2 Week 3 and Week 4 are 27, 23, 28 and 24, respectively. The forecast for these weeks were 23, 30, 22 and 26, respectively. What the mean absolute error (MAE) of the forecast? (Specify your answer to 2 decimal places)

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