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Question
The following table shows the data for the sales of tennis rackets at a store for 4 consecutive months. Find the forecast error in month 4 using a 3-month moving average.
| Month | 1 | 2 | 3 | 4 |
| Sales | 80 | 95 | 125 | 110 |
a. The forecast error in month 4 is less than or equal to 5.
b. The forecast error in month 4 is more than 5 but less than or equal to 10.
c. The forecast error in month 4 is more than 10 but less than or equal to 15.
d. The forecast error in month 4 is more than 15.
Answer
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