Table P-21 contains the weekly sales for a food item for 52 consecutive weeks. a. Plot the
Question:
a. Plot the sales data as a time series.
b. Do you think this series is stationary or nonstationary?
c. Using Minitab or a similar program, compute the autocorrelations of the sales series for the first 10 time lags. Is the behavior of the autocorrelations consistent with your choice in part b? Explain.
Transcribed Image Text:
TA EP-21 ее Sales of a Food Item (Read across) 2649.9 2898.7 2897.8 3054.3 3888.1 3963.6 3258.9 3199.6 3504.3 2445.9 1833.9 2185.4 3367.4 1374.1 497.5 1699.0 1425.4 1946.2 1809.9 2339.9 1717.9 2420.3 1396.5 1612.1 1367.9 2176.8 2725.0 3723.7 2016.0 862.2 1234.6 1166.5 1759.5 1039.4 2404.8 2047.8 4072.6 4600.5 2370.1 3542.3 2273.0 3596.6 2615.8 2253.3 17794 3917.9 3329.3 1864.4 3318.9 3342.6 2131.9 3003.2 2
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a Time series plot follows b The sales time series appears to vary about a fixed level so it ...View the full answer
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