Question: 20. In this problem, you are to test the validity of your forecasting model. Here are the forecasts for a model you have been using
20. In this problem, you are to test the validity of your forecasting model. Here are the forecasts for a model you have been using and the actual demands that occurred:

Use the method stated in the text to compute MAD and tracking signal. Then decide whether the forecasting model you have been using is giving reasonable results.
WEEK FORECAST ACTUAL 1 800 900. 23456 850 1,000 950 1,050 950 900 5 1,000 900 975 1,100
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