The following data are monthly sales of jeans at a local department store. The buyer would like to forecast sales of jeans for the next month, July.

a) Forecast sales of jeans for March through June using the naïve method, a two-period moving average, and exponential smoothing with an α = 0.1.

b) Compare the forecasts using MAD and decide which is best.

c) Using your method of choice, make a forecast for the month of July.

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Month January February March April May June Sales 37 35 42 38 48 45