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( SHOW YOUR COMPLETE WORK ) Two independent forecasting methods 1 and 2 have been used each week for the past eight weeks. The actual

(SHOW YOUR COMPLETE WORK) Two independent forecasting methods 1 and 2 have been used each week for the past eight weeks. The actual demand and demand forecasts from these two methods are shown below.
\table[[WEEK,\table[[ACTUAL DEMAND],[(in units)]],DEMAND FORECASTS (in units)],[Method 1,Method 2],[Eight weeks ago,164,162,158],[Seven weeks ago,159,161,164],[Six weeks ago,158,157,161],[Five weeks ago,158,159,159],[Four weeks ago,161,160,161],[Three weeks ago,159,160,159],[Two weeks ago,161,160,160],[One week ago,,162,161]]
a. Calculate the Mean Absolute Deviation (MAD) measures for forecasting methods 1 and 2. Which forecasting method is better based on MAD?
[12 points]
b. Calculate the Mean Squared Error (MSE) measures for forecasting methods 1 and 2. Which forecasting method is better based on MSE?
[12 points]
c. Calculate the Mean Absolute Percent Error (MAPE) measures for forecasting methods 1 and 2. Which forecasting method is better based on MAPE?
[29 points]
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