The following table shows U.S. petroleum imports, imports
Chapter 6, Problem 6-72(choose chapter or problem)
The following table shows U.S. petroleum imports, imports as a percentage of total, and Persian Gulf imports as a percentage of all imports by year since 1973 (source: U.S. Department of Energy Web site, http://www.eia.doe.gov/). Construct and interpret either a digidot plot or a separate stemand-leaf and time series plot for each column of data.
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