Question: An operations analyst is forecasting this year's demand for one of his company's products based on the following historical data: Year Number Sold 4 years

An operations analyst is forecasting this year's demand for one of his company's products based on the following historical data:

Year Number Sold
4 years ago 10,000
3 years ago 12,000
2 years ago 18,000
Last year 20,000

The previous trend line has predicted 18,500 for two years ago, and 19,700 for last year. What was the mean absolute deviation for these forecasts?

Multiple Choice

500

400

200

800

100

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