According to the Rubber Manufacturers Association, there are approximately 300 million tires scrapped each year in the U.S. The summary table below describes the fate of these scrapped tires.
a. Identify the variable measured for each scrapped tire.
b. What are the classes (categories)?
c. Calculate the class relative frequencies.
d. Use the results, part c, to form a pie chart for the data.
e. Use the results, part c, to form a Pareto diagram for the data. Interpret the graph.

Fate of Tires                                       Number (millions)
Burned for fuel ....................................        155
Recycled into new products ..............           96
Exported ...............................................            7
Land disposed .....................................          42
Totals ....................................................        300