* Aircraft Operation and Performance ;

data air_fre;

label utl='Average Hours per Day Use of Aircraft'

      asl='Average Length of Nonstop Legs of Flights(1000 miles)

      spa='Average Number of Seats per Aircraft(100 seats)

      alf='Average Load Factor(% of seats occupied by passengers)

      cpm='Cost per Passenger mile(cents)'

      type='(asl>1.200)=1';



  utl      asl       spa      avs     alf      cpm      csm     type

--------------------------------------------------------------------

  8.09    1.528    0.3522    4.32    0.287    3.306    0.949      1

  9.56    2.189    0.3279    4.62    0.349    3.527    1.230      1

 10.80    1.518    0.1356    4.43    0.362    3.959    1.432      1

  5.65    0.821    0.1290    4.01    0.378    4.737    1.791      0

 10.20    1.692    0.3007    4.65    0.381    3.096    1.179      1

  7.94    0.949    0.1488    4.00    0.394    3.689    1.452      0

 13.30    3.607    0.3390    5.01    0.397    2.357    0.935      1

  8.42    1.495    0.3597    4.44    0.400    2.833    1.133      1

  9.57    0.863    0.1390    4.26    0.405    3.313    1.343      0

  9.00    0.845    0.1390    4.25    0.409    3.044    1.245      0

  9.62    0.840    0.1390    4.25    0.410    2.846    1.166      0

  7.91    1.350    0.1920    4.42    0.412    2.341    0.965      1

  8.83    2.377    0.3287    4.73    0.417    2.780    1.159      1

  8.35    1.031    0.1365    4.22    0.422    3.392    1.431      0

 10.60    2.780    0.1282    4.65    0.425    3.856    1.637      1

  7.52    0.975    0.2025    3.96    0.426    3.462    1.476      0

  8.36    1.912    0.3148    4.65    0.434    2.711    1.177      1

  8.43    1.584    0.1607    4.47    0.439    2.743    1.203      1

  7.55    1.164    0.1270    4.22    0.452    3.760    1.700      0

  7.70    1.236    0.1221    4.28    0.455    3.311    1.507      1

  9.38    1.123    0.1481    4.24    0.466    2.404    1.119      0

  8.91    0.961    0.1236    4.16    0.476    2.962    1.411      0

  7.27    1.416    0.1145    4.38    0.476    3.437    1.636      1

  8.71    1.392    0.1148    4.44    0.478    2.906    1.390      1

  8.29    0.877    0.1060    4.37    0.486    3.140    1.528      0

  9.50    2.515    0.3546    4.83    0.488    2.275    1.111      1

  8.44    0.871    0.1186    4.38    0.495    2.954    1.461      0

  9.47    1.408    0.1345    4.70    0.504    3.306    1.662      1

 10.80    1.576    0.1361    4.87    0.535    2.425    1.297      1

  6.84    1.008    0.1150    4.13    0.539    2.971    1.600      0

  6.31    0.823    0.0943    4.06    0.541    4.024    2.176      0

  8.48    1.963    0.1381    4.70    0.582    2.363    1.375      1

  7.87    1.790    0.1375    4.68    0.591    2.258    1.333      1