| 1. Title: 1985 Auto Imports Database
| 
| 2. Source Information:
|    -- Creator/Donor: Jeffrey C. Schlimmer (Jeffrey.Schlimmer@a.gp.cs.cmu.edu)
|    -- Date: 19 May 1987
|    -- Sources:
|      1) 1985 Model Import Car and Truck Specifications, 1985 Ward's
|         Automotive Yearbook.
|      2) Personal Auto Manuals, Insurance Services Office, 160 Water
|         Street, New York, NY 10038 
|      3) Insurance Collision Report, Insurance Institute for Highway
|         Safety, Watergate 600, Washington, DC 20037
| 
| 3. Past Usage:
|    -- Kibler,~D., Aha,~D.~W., \& Albert,~M. (1989).  Instance-based prediction
|       of real-valued attributes.  {\it Computational Intelligence}, {\it 5},
|       51--57.
| 	 -- Predicted price of car using all numeric and Boolean attributes
| 	 -- Method: an instance-based learning (IBL) algorithm derived from a
| 	    localized k-nearest neighbor algorithm.  Compared with a
| 	    linear regression prediction...so all instances
| 	    with missing attribute values were discarded.  This resulted with
| 	    a training set of 159 instances, which was also used as a test
| 	    set (minus the actual instance during testing).
| 	 -- Results: Percent Average Deviation Error of Prediction from Actual
| 	    -- 11.84% for the IBL algorithm
| 	    -- 14.12% for the resulting linear regression equation
| 
| 4. Relevant Information:
|    -- Description
|       This data set consists of three types of entities: (a) the
|       specification of an auto in terms of various characteristics, (b)
|       its assigned insurance risk rating, (c) its normalized losses in use
|       as compared to other cars.  The second rating corresponds to the
|       degree to which the auto is more risky than its price indicates.
|       Cars are initially assigned a risk factor symbol associated with its
|       price.   Then, if it is more risky (or less), this symbol is
|       adjusted by moving it up (or down) the scale.  Actuarians call this
|       process "symboling".  A value of +3 indicates that the auto is
|       risky, -3 that it is probably pretty safe.
| 
|       The third factor is the relative average loss payment per insured
|       vehicle year.  This value is normalized for all autos within a
|       particular size classification (two-door small, station wagons,
|       sports/speciality, etc...), and represents the average loss per car
|       per year.
| 
|    -- Note: Several of the attributes in the database could be used as a
|             "class" attribute.
| 
| 5. Number of Instances: 205
| 
| 6. Number of Attributes: 26 total
|    -- 15 continuous
|    -- 1 integer
|    -- 10 nominal
| 
| 7. Attribute Information:     
|      Attribute:                Attribute Range:
|      ------------------        -----------------------------------------------
|   1. symboling:                -3, -2, -1, 0, 1, 2, 3.
|   2. normalized-losses:        continuous from 65 to 256.
|   3. make:                     alfa-romero, audi, bmw, chevrolet, dodge, honda,
|                                isuzu, jaguar, mazda, mercedes-benz, mercury,
|                                mitsubishi, nissan, peugot, plymouth, porsche,
|                                renault, saab, subaru, toyota, volkswagen, volvo
|   4. fuel-type:                diesel, gas.
|   5. aspiration:               std, turbo.
|   6. num-of-doors:             four, two.
|   7. body-style:               hardtop, wagon, sedan, hatchback, convertible.
|   8. drive-wheels:             4wd, fwd, rwd.
|   9. engine-location:          front, rear.
|  10. wheel-base:               continuous from 86.6 120.9.
|  11. length:                   continuous from 141.1 to 208.1.
|  12. width:                    continuous from 60.3 to 72.3.
|  13. height:                   continuous from 47.8 to 59.8.
|  14. curb-weight:              continuous from 1488 to 4066.
|  15. engine-type:              dohc, dohcv, l, ohc, ohcf, ohcv, rotor.
|  16. num-of-cylinders:         eight, five, four, six, three, twelve, two.
|  17. engine-size:              continuous from 61 to 326.
|  18. fuel-system:              1bbl, 2bbl, 4bbl, idi, mfi, mpfi, spdi, spfi.
|  19. bore:                     continuous from 2.54 to 3.94.
|  20. stroke:                   continuous from 2.07 to 4.17.
|  21. compression-ratio:        continuous from 7 to 23.
|  22. horsepower:               continuous from 48 to 288.
|  23. peak-rpm:                 continuous from 4150 to 6600.
|  24. city-mpg:                 continuous from 13 to 49.
|  25. highway-mpg:              continuous from 16 to 54.
|  26. price:                    continuous from 5118 to 45400.
| 
| 8. Missing Attribute Values: (denoted by "?")
|    Attribute #:   Number of instances missing a value:
|    2.             41
|    6.             2
|    19.            4
|    20.            4
|    22.            2
|    23.            2
|    26.            4



-3, -2, -1, 0, 1, 2, 3.

normalized-losses:        continuous.
make:                     alfa-romero, audi, bmw, chevrolet, dodge, honda,
                          isuzu, jaguar, mazda, mercedes-benz, mercury,
                          mitsubishi, nissan, peugot, plymouth, porsche,
                          renault, saab, subaru, toyota, volkswagen, volvo
fuel-type:                diesel, gas.
aspiration:               std, turbo.
num-of-doors:             four, two.
body-style:               hardtop, wagon, sedan, hatchback, convertible.
drive-wheels:             4wd, fwd, rwd.
engine-location:          front, rear.
wheel-base:               continuous.
length:                   continuous.
width:                    continuous.
height:                   continuous.
curb-weight:              continuous.
engine-type:              dohc, dohcv, l, ohc, ohcf, ohcv, rotor.
num-of-cylinders:         eight, five, four, six, three, twelve, two.
engine-size:              continuous.
fuel-system:              1bbl, 2bbl, 4bbl, idi, mfi, mpfi, spdi, spfi.
bore:                     continuous.
stroke:                   continuous.
compression-ratio:        continuous.
horsepower:               continuous.
peak-rpm:                 continuous.
city-mpg:                 continuous.
highway-mpg:              continuous.
price:                    continuous.