Percents of on-time arrivals for flights in 2006 and 2007 were collected for 11 randomly selected airports. Data for these airports follow (Research and Innovative Technology Administration website, August 29, 2008). Use α = .05 to test the hypothesis that there is no difference between the median percent of on-time arrivals for the two years. What is your conclusion?

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Percent On Time Airport Boston Logan Chicago O'Hare Chicago Midway Fort Lauderdale Los Angeles 6 New York (JFK) Orlando Washington (Dulles) 5 6 2