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| Cars93   | R Documentation   |
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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).
`http://www.amstat.org/publications/jse/v1n1/datasets.lock.html <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.
