(Solution) - The data below stored in Drive Thru Speed represent the average -(2025 Original AI-Free Solution)

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Academic Level: Undergrad. (yrs 3-4)

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The data below (stored in Drive-Thru Speed) represent the average time (in seconds) it took to be served at the drive-through at McDonald's from 1998 to 2012:

a. Plot the time series.
b. Fit a three-year moving average to the data and plot the results.
c. Using a smoothing coefficient of W = 0.50, exponentially smooth the series and plot the results.
d. What is your exponentially smoothed forecast for 2013?
e. Repeat (c) and (d), using W = 0.25.
f. Compare the results of (d) and (e)?