The solar energy consumed (in trillion BTU) in the U.S. by year from 1989 to 2004 (source: U.S. Department of Energy Web site, http://www.eia.doe.gov/emeu) is shown below.   55.291 59.718 62.688 63.886 66.458 68.548 69.857 70.833 70.237 69.787 68.793 66.388 65.454 64.391 63.62 63.287   Construct a 95% confidence

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