The data in the table below represent warehouse club and superstore sales in the United States on
Question:
a. Prepare a time-series plot of the data, and visually inspect that plot to determine the characteristics you see in this series.
b. Use a smoothing model to develop a forecast of sales for the next 12 months, and explain why you selected that model. Plot the actual and forecast values. Determine the RMSE for your model during the historical period.
Transcribed Image Text:
U.S. Retail Sales at Warehouse Clubs and Superstores (in Millions of Dollars, NSA) Date Sales Date Sales Jan-92 2,580 Oct-95 Nov-95 5,460 6,288 8,403 4,758 Feb-92 Mar-92 2,616 2,838 2,985 Dec-95 Jan-96 Apr-92 May-92 Jun-92 Jul-92 3,258 3,107 3,097 3,288 3,077 3,429 4,011 Feb-96 4,914 5,431 5,474 Mar-96 Аpрг-96 May-96 Jun-96 Jul-96 Aug-92 Sep-92 Oct-92 6,124 6,027 5,914 6,244 Nov-92 Aug-96 Sep-96 Oct-96 Dec-92 5,739 2,877 2,885 3,259 3,454 3,771 3,667 3,743 3,792 3,699 4,082 5,808 6,373 6,994 Jan-93 Feb-93 Nov-96 Mar-93 Dec-96 9,018 5,694 5,431 6,240 6,101 6,849 6,694 6,815 6,948 6,450 7,190 Apr-93 May-93 Jan-97 Feb-97 Jun-93 Mar-97 Jul-93 Apr-97 May-97 Aug-93 Sep-93 Oct-93 Nov-93 Dec-93 Jan-94 Jun-97 Jul-97 4,727 6,672 3,560 Aug-97 Sep-97 Oct-97 Feb-94 3,575 4,220 4,282 4,594 4,691 4,629 4,795 4,632 Nov-97 Dec-97 7,738 9,769 6,665 6,400 7,277 Mar-94 Jan-98 Feb-98 Mar-98 Аpг-94 May-94 Jun-94 Jul-94 Apr-98 May-98 Jun-98 7,584 8,169 8,179 Aug-94 Sep-94 Oct-94 5,067 5,746 Jul-98 Aug-98 Sep-98 Oct-98 Nov-98 Dec-98 8,118 8,284 7,962 8,636 9,433 Nov-94 Dec-94 7,965 4,317 4,118 4,855 Jan-95 Feb-95 Mar-95 11,786 8,082 7,761 8,994 8,803 Jan-99 Feb-99 Apr-95 May-95 4,999 5,343 5,392 5,274 5,435 5,217 Jun-95 Mar-99 Аpг-99 May-99 Jun-99 Jul-95 Aug-95 Sep-95 9,712 9,843
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Business Forecasting with Forecast X
ISBN: 978-0073373645
6th edition
Authors: Holton wilson, barry keating, john solutions inc
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