The Department of Transportation (DOT) fields thousands of complaints about airl

Question

The Department of Transportation (DOT) fields thousands of complaints about airlines each year. The DOT categorizes and tallies complaints, and then periodically publishes rankings of airline performance. The following table presents the 2006 results for the 10 largest U.S. airlines.

Calculate the mean and the median number of complaints for this sample. (Round your answers to 2 decimal places.)

Calculate the variance and the standard deviation. (Do not round intermediate calculations. Round your answers to 2 decimal places.)

The Department of Transportation (DOT) fields thousands of complaints about airlines each year. The DOT categorizes and tallies complaints, and then periodically publishes rankings of airline performance. The following table presents the 2006 results for the 10 largest U.S. airlines.

Explanation / Answer

Assuming that the data is in thousands:

a) Least complaints =

  Southwest Airlines

b) Most =

  United Airlines

c) Range = 13.6 - 1.82 = 11.78

d) Mean = 8.34

Meadian = 8.84

e) Var = 15.74

SD = 3.97

  Southwest Airlines

b) Most =

  United Airlines

c) Range = 13.6 - 1.82 = 11.78

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