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Quiz1 Fa 07 KEY

# Quiz1 Fa 07 KEY - Name ID KEY ECON 2843 Fall 2007 Quiz 1...

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Name KEY ID ECON 2843 Fall 2007 Quiz 1 Students must show all work on problems that involve calculation, even if the question is multiple choice. Questions 1 through 5 refer to the following: The Air Transport Association of America publishes figures on the busiest airports in the United States. The following frequency distribution has been constructed from these figures for a recent year for this population. Number of passengers Number of arriving and departing Airports (in millions) 20 – 30 8 30 – 40 7 40 – 50 1 50 – 60 0 60 – 70 3 70 – 80 1 1. What is the average number of passengers arriving and departing for the population? 2. What is the coefficient of variation? 1

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3. If one of the airports is selected randomly, what is the probability that the airport will have an amount of passengers that is greater than or equal to the median class? .60 4. What is the cumulative relative frequency of the class 50 – 60 ? 5. The data set is
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Quiz1 Fa 07 KEY - Name ID KEY ECON 2843 Fall 2007 Quiz 1...

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