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:

WEEK FORECAST ACTUAL 1 800 900 2 850 1,000 3 950 1,050 4 950 900 5 1,000 900 6 975 1,100 Use the method stated in the text to compute the MAD and tracking signal. Then decide whether the forecasting model you have been using is giving reasonable results.