Essentials Of Statistics For Business & Economics
9th Edition
ISBN: 9780357045435
Author: David R. Anderson, Dennis J. Sweeney, Thomas A. Williams, Jeffrey D. Camm, James J. Cochran
Publisher: South-Western College Pub
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Chapter 1, Problem 16SE
Athletic Shoe Sales. Skechers U.S.A., Inc., is a performance footwear company headquartered in Manhattan Beach, California. The sales revenue for Skechers over a four-year period are as follows:
- a. Are these cross-sectional or time-series data?
FIGURE 1.9 Estimated Monthly Jewelry Sales in the United States for 2016
Source: The U.S. Census Bureau tracks sales per month for various products and services through its Monthly Retail Trade Survey (https://www.census.gov/retail/mrts/historic_releases.html)
- b. Construct a bar graph similar to Figure 1.2 B.
- c. What can you say about how Skecher’s sales are changing over these four years?
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Which of the following time series forecasting methods would not be used to forecast seasonal data?
The following data set provides the total number of shipments of core major household appliances in the U.S. from 2000 to 2016 (in millions):
Year
Shipments (millions)
2000
38.4
2001
38.2
2002
40.8
2003
42.5
2004
46.1
2005
47.0
2006
46.7
2007
44.1
2008
39.8
2009
36.5
2010
38.2
2011
36.0
2012
35.8
2013
39.2
2014
41.5
2015
42.9
2016
44.7
a. Plot the time series.
b. Fit a three-year moving average to the data and plot the results.
c. Fit a five-year moving average to the data and plot the results.
d. Compute a linear trend forecasting equation and plot the trend line.
e. Compute a quadratic trend forecasting equation and plot the results.
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Essentials Of Statistics For Business & Economics
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