Question: The data below (stored in Drive-ThruSpeed ) represent the average time (in seconds) it took to be served at the drive-through at McDonalds from 1998

The data below (stored in Drive-ThruSpeed ) 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).
g. What conclusions can you reach about the drive-through speed at McDonald’s?

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