Percents of on-time arrivals for flights in the past two years were collected for 11 randomly selected airports. data for these airports follow. 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 Two Years Ago ear 7 Chicago O'Hare Chicago Midway Fort Lauderdale Los Angeles New York (JFK) Washington (Dulles) 5 7 5 4 2