Construct a time series plot for these data and describe in words what it reveals.

The automobile sales in the United States (in thousands of cars) for the "Big Three" U.S. manufacturers (Ford, General Motors, and Chrysler), European manufacturers, and Japanese manufacturers for 1995 are reported in the table on p.113.

a. Construct a relative frequency bar graph for these data.

b. Stacking is the combining of all bars in a bar graph into a single bar. by drawing one on top of the other and distinguishing one from another by the use of colors or patterns. Stack the relative frequencies of the five car manufacturers' sales.

c. What information about the U.S. automobile market is reflected in your graph of part a?

d. What share of the US. automobile market has been captured by US. manufacturers'?