Question

The U.S. Department of Transportation tracks and reports a wide variety of information regarding airlines and airports. It reports the “percent on-time” frequently. Compare the percent on-time arrival performance for the 31 major airports in the United States for the year to date through October 31, 2008, versus the year to date through October 31, 2009.
At the 0.05 level of significance, test the claim that there is no correlation between the 2008 year-to-date and the 2009 year-to-date percent on-time arrival performance at these airports.


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  • CreatedAugust 28, 2015
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