The Hillel Sandwich Shop is trying to estimate its profit for the upcoming month. In order to do this, it must forecast future sandwich sales. Below are the number of sandwiches sold each day of the five-day work week for the past four weeks (week 4 is the most recent week).
a. Graph this time series.
b. Determine whether the time series exhibits any linear trend.
c. Using a five-day moving average, forecast the number of sandwiches that will be sold daily during the upcoming week.
d. What is the forecast of the number of sandwiches sold daily during the upcoming week if the firm uses exponential smoothing? (Assume that the smoothing constant is a = . 1 0 .)
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