Question: Use the information below to answer the next two questions: Harlen Industries has a simple forecasting model: Take the actual demand for the same month

Use the information below to answer the next two questions: Harlen Industries has a simple forecasting model: Take the actual demand for the same month last year and divide that by the number of fractional weeks in that month. This gives the average weekly demand for that month. This weekly average is used as the weekly forecast for the same month this year. This weekly average is used as the weekly forecast for the same month this year. This technique was used to forecast 8 weeks for this year, which are shown below along with the actual demand that occurred. The following 8 weeks show the forecast (based on last year) and the demand that actually occurred: What is the Mean Absolute Deviation (MAD) of forecast errors? 19.42 20.21 23.75 21.83

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