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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 Spring '08
 HUDGINS
 Standard Deviation, Mean, Inflation rates, following frequency distribution, Air Transport Association of America

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