ANOVA: Degrees of freedom and the F statistic
For the time being, the air traffic control system in the United States is run by the federal government. Several groups disagree with this and would like to privatize the air traffic control system. Among the arguments given for privatization is that flight delays are much too common in the United States. A first step in deciding if, indeed, delays in the U.S. are "too common" might be to compare the flight delay information from the U.S. and other nations.
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The solution examines an ANOVA table to find the degree of freedom and the F statistic.