Cars93                 package:MASS                 R Documentation

Data from 93 Cars on Sale in the USA in 1993

Description:

     The 'Cars93' data frame has 93 rows and 27 columns.

Usage:

     Cars93

Format:

     This data frame contains the following columns:

     'Manufacturer' Manufacturer.

     'Model' Model.

     'Type' Type: a factor with levels '"Small"', '"Sporty"',
          '"Compact"', '"Midsize"', '"Large"' and '"Van"'.

     'Min.Price' Minimum Price (in $1,000): price for a basic version.

     'Price' Midrange Price (in $1,000): average of 'Min.Price' and
          'Max.Price'.

     'Max.Price' Maximum Price (in $1,000): price for "a premium
          version".

     'MPG.city' City MPG (miles per US gallon by EPA rating).

     'MPG.highway' Highway MPG.

     'AirBags' Air Bags standard. Factor: none, driver only, or driver
          & passenger.

     'DriveTrain' Drive train type: rear wheel, front wheel or 4WD;
          (factor).

     'Cylinders' Number of cylinders (missing for Mazda RX-7, which has
          a rotary engine).

     'EngineSize' Engine size (litres).

     'Horsepower' Horsepower (maximum).

     'RPM' RPM (revs per minute at maximum horsepower).

     'Rev.per.mile' Engine revolutions per mile (in highest gear).

     'Man.trans.avail' Is a manual transmission version available? (yes
          or no, Factor).

     'Fuel.tank.capacity' Fuel tank capacity (US gallons).

     'Passengers' Passenger capacity (persons)

     'Length' Length (inches).

     'Wheelbase' Wheelbase (inches).

     'Width' Width (inches).

     'Turn.circle' U-turn space (feet).

     'Rear.seat.room' Rear seat room (inches) (missing for 2-seater
          vehicles).

     'Luggage.room' Luggage capacity (cubic feet) (missing for vans).

     'Weight' Weight (pounds).

     'Origin' Of non-USA or USA company origins? (factor).

     'Make' Combination of Manufacturer and Model (character).


Details:

     Cars were selected at random from among 1993 passenger car models
     that were listed in both the _Consumer Reports_ issue and the
     _PACE Buying Guide_.  Pickup trucks and Sport/Utility vehicles
     were eliminated due to incomplete information in the _Consumer
     Reports_ source.  Duplicate models (e.g., Dodge Shadow and
     Plymouth Sundance) were listed at most once.

     Further description can be found in Lock (1993).

Source:

     Lock, R. H. (1993) 1993 New Car Data. _Journal of Statistics
     Education_ *1*(1). <URL:
     http://www.amstat.org/publications/jse/v1n1/datasets.lock.html>.

References:

     Venables, W. N. and Ripley, B. D. (1999) _Modern Applied
     Statistics with S-PLUS._ Third Edition. Springer.

