Question: is this correct ? a The following table provides the actual sales and forecast data for a product in the past three months. Month Actual

is this correct ?

a The following table provides the actual sales and forecast data for a product in the past three months. Month Actual Sales Forecast Jan 17 20 Feb 20 19 Mar 18 20 (a) What is the 2-month simple moving average forecast (i.e., simple moving average forecast with n=2) for April? 19 (b) What is the exponential smoothing forecast for April with =0.52 19 (c) What is the MAD value at the end of Mar? 2 (d) What is the cumulative sum of forecast errors at the end of Mar? -4 I (e) What is the tracking signal value at the end of Mar? -2

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