Question: 41. Demand for Consumer Goods. The weekly demand (in cases) for a particular brand of automatic dishwasher detergent for a chain of grocery stores located

41. Demand for Consumer Goods. The weekly demand (in cases) for a particular brand of automatic dishwasher detergent for a chain of grocery stores located in Columbus, Ohio, follows.

Week Demand Week Demand 1 22 6 24 2 18 7 20 3 23 8 19 4 21 9 18 5 17 10 21

a. Construct a time series plot. What type of pattern exists in the data?

b. Use a three-week moving average to develop a forecast for week 11.

c. Use exponential smoothing with a smoothing constant of a = .2 to develop a forecast for week 11.

d. Which of the two methods do you prefer? Why?

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