1.8 Top 10 suppliers of U.S. crude oil imports (in million barrels) for the year 2003 are listed below

(U.S. Census Bureau, Statistical Abstract of the United States, 2005).

Saudi Arabia* 629 Venezuela* 439 Nigeria* 306 Iraq* 171 Kuwait* 75 Mexico 580 Canada 565 Angola 132 United Kingdom 127 Norway 60 a Construct a bar chart for these data. Comment on the U.S. crude oil import from different countries.

b Construct a dot plot of crude oil imports.
Comment on the distribution of U.S. crude oil import from different countries. What information from a bar chart in part

(a) is missing from a dot plot in part (b)?
c Suppose the countries marked by an asterisk (*) are OPEC countries. Compare crude oil amounts supplied by OPEC and non-OPEC countries, using the appropriate graph.