Question

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. Assume these are population data.
Number of Passengers
Arriving and Departing Number of
(Millions) ........ Airports
20–under 30 ........ 8
30–under 40 ........ 7
40–under 50 ........ 1
50–under 60 ........ 0
60–under 70 ........ 3
70–under 80 ........ 1

a. Calculate the mean of these data.
b. Calculate the mode.
c. Calculate the median.
d. Calculate the variance.
e. Calculate the standard deviation.



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  • CreatedFebruary 19, 2015
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