NAME: NWFlightsDoc.txt TYPE: Census of January 2009 flights SIZE: 22,945 observations, 14 variables DESCRIPTIVE ABSTRACT: Data on Northwest airline flight departure and arrival times for 22,945 flights in January 2009. SOURCES: Bureau of Transportation Statistics VARIABLE DESCRIPTIONS: YEAR - MONTH - daymonth - Day of Month weekday - Day of Week (1 = Monday, 2 = Tuesday, 3 = Wednesday, 4 = Thursday, 5 = Friday, 6 = Saturday, 7 = Sunday) date - Flight Date CARRIER - tail - Tail Number flight - Flight Number ORIGIN - Origin airport DEST - Destination airport depdelay - Departure Delay arrdelay - Arrival Delay label - filter_$ - ORIGIN="GRR" (FILTER) (0 = not selected, 1 = selected) SPECIAL NOTES: A negative value for departure delay means the flight departed early. A negative value for arrival delay means the flight arrived early.