CSM Worldwide forecasts global production for all automobile manufacturers. The following CSM data show the forecast of global auto production for General Motors, Ford, DaimlerChrysler, and Toyota for the years 2004 to 2007 (USA Today, December 21, 2005).

Data are in millions of vehicles.

24 Chapter 1 Data and Statistics 0.5 1.0 1.5 2.0 2.5 3.0 0

3.5 Federal Spending ($ trillions)

Year 2002 2003 2004 2005 2006 2007 2008 FIGURE 1.8 FEDERAL SPENDING Manufacturer 2004 2005 2006 2007 General Motors 8.9 9.0 8.9 8.8 Ford 7.8 7.7 7.8 7.9 DaimlerChrysler 4.1 4.2 4.3 4.6 Toyota 7.8 8.3 9.1 9.6

a. Construct a time series graph for the years 2004 to 2007 showing the number of vehicles manufactured by each automotive company. Show the time series for all four manufacturers on the same graph.

b. General Motors has been the undisputed production leader of automobiles since 1931.

What does the time series graph show about who is the world’s biggest car company?

Discuss.

c. Construct a bar graph showing vehicles produced by automobile manufacturer using the 2007 data. Is this graph based on cross-sectional or time series data?