This is Dataplot data file BARNETT.DAT Airline On-time Arrival Performance Project Question--Which airline has better on-time performance? Number of observations = 6 Number of variables per line image = 4 Order of variables on a line image-- 1. Response variable 1 = % on time Alaska Airlines 2. Response variable 2 = number of arrivals Alaska Airlines 3. Response variable 3 = % on time America West 4. Response variable 4 = number of arrivals America West Note--Example of Simpson's Paradox To read this file into Dataplot-- SKIP 25 READ BARNETT.DAT Y1 N1 Y2 N2 Alaska Airlines America West Airlines Destination % Arrivals Number of %Arrivals Number of on Time Arrivals on Time Arrivals ---------------------------------------------------------------------------- 88.9 559 85.6 811 Los Angeles 94.8 233 92.1 5,255 Phoenix 91.4 232 85.5 488 San Diego 83.1 605 71.3 449 San Francisco 85.8 2,146 76.7 262 Seattle 86.7 3,775 89.1 7,225 Total