;% ;% !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! ;% ;% Attributes 2,4, and 6 deleted. Midrange price treated as the class ;% attribute. ;% ;% As used by Kilpatrick, D. & Cameron-Jones, M. (1998). Numeric prediction ;% using instance-based learning with encoding length selection. In Progress ;% in Connectionist-Based Information Systems. Singapore: Springer-Verlag. ;% ;% !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! ;% ;% NAME: 1993 New Car Data ;% TYPE: Sample ;% SIZE: 93 observations, 26 variables ;% ;% DESCRIPTIVE ABSTRACT: ;% Specifications are given for 93 new car models for the 1993 year. ;% Several measures are given to evaluate price, mpg ratings, engine size, ;% body size, and features. ;% ;% SOURCES: ;% _Consumer Reports: The 1993 Cars - Annual Auto Issue_ (April 1993), ;% Yonkers, NY: Consumers Union. ;% _PACE New Car & Truck 1993 Buying Guide_ (1993), Milwaukee, WI: Pace ;% Publications Inc. ;% ;% VARIABLE DESCRIPTIONS: ;% Line 1 ;% Columns ;% 1 - 14 Manufacturer ;% 15 - 29 Model ;% 30 - 36 Type ;% Small, Sporty, Compact, Midsize, Large - as defined in the ;% _Consumer Reports_ article ;% 38 - 41 Minimum Price (in $1,000) - Price for basic version of this model ;% 43 - 46 Midrange Price (in $1,000) - Average of Min and Max prices ;% 48 - 51 Maximum Price (in $1,000) - Price for a premium version ;% 53 - 54 City MPG (miles per gallon by EPA rating) ;% 56 - 57 Highway MPG ;% 59 - 59 Air Bags standard ;% 0 = none, 1 = driver only, 2 = driver & passenger ;% 61 - 61 Drive train type ;% 0 = rear wheel drive ;% 1 = front wheel drive ;% 2 = all wheel drive ;% 63 - 63 Number of cylinders ;% 65 - 67 Engine size (liters) ;% 69 - 71 Horsepower (maximum) ;% 73 - 76 RPM (revs per minute at maximum horsepower) ;% ;% Line 2 ;% Columns ;% 1 - 4 Engine revolutions per mile (in highest gear) ;% 6 - 6 Manual transmission available ;% 0 = No, 1 = Yes ;% 8 - 11 Fuel tank capacity (gallons) ;% 13 - 13 Passenger capacity (persons) ;% 15 - 17 Length (inches) ;% 19 - 21 Wheelbase (inches) ;% 23 - 24 Width (inches) ;% 26 - 27 U-turn space (feet) ;% 29 - 32 Rear seat room (inches) ;% 34 - 35 Luggage capacity (cu. ft.) ;% 37 - 40 Weight (pounds) ;% 42 - 42 Domestic? ;% 0 = non-U.S. manufacturer, 1 = U.S. manufacturer ;% ;% Values are aligned and delimited by blanks. ;% Missing values are denoted with *. ;% There are two data lines for each case. ;% ;% SPECIAL NOTES: ;% The only missing values are for CYLINDERS in the rotary engine Mazda ;% RX-7, REAR SEAT room for the two-seaters (Corvette and RX-7), and ;% LUGGAGE capacity for the vans and two-seaters. ;% ;% WEIGHT is taken from the _Consumer Reports_ data and includes a full ;% fuel tank, automatic transmission (if available), and air conditioning. ;% ;% STORY BEHIND THE DATA: ;% 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. ;% ;% A similar dataset for 1989 model cars appeared as one of the sample ;% datasets shipped with the _Student Edition of Execustat_ (PWS-KENT ;% 1990). ;% ;% Further description can be found in the "Datasets and Stories" article ;% "1993 New Car Data" in the _Journal of Statistics Education_ (Lock 1993). ;% Send the message ;% ;% send jse/v1n1/datasets.lock ;% ;% to the address archive@jse.stat.ncsu.edu ;% ;% PEDAGOGICAL NOTES: ;% This is a multi-purpose dataset that can be used at many points in an ;% introductory course. It includes many good numeric variables and ;% several options for dividing the cars up into groups. Students tend to ;% be familiar with most of the variables (and specific car models). They ;% can anticipate and pose explanations for many of the relationships to ;% be found in the data, although some surprises may be encountered. One ;% can easily find examples of pairs of variables that demonstrate strong ;% or weak, positive or negative associations. PRICE and MPG variables ;% tend to be popular choices as "dependent" variables. Basic graphs will ;% often reveal unusual data values (like the price for a Mercedes-Benz). ;% ;% REFERENCES: ;% Lock, R. H. (1993), "1993 New Car Data," _Journal of Statistics ;% Education_, 1, No. 1. ;% _Student Edition of Execustat_ (1990), Boston, MA: PWS-KENT ;% Publishing Co. ;% ;% SUBMITTED BY: ;% Robin H. Lock ;% Mathematics Department ;% St. Lawrence University ;% Canton, NY 13617 ;% (315) 379-5960 ;% rlock@stlawu.bitnet ;% (defun auto93 () (data :name 'auto93 :columns '(Manufacturer Type City_MPG Highway_MPG Air_Bags_standard Drive_train_type Number_of_cylinders Engine_size Horsepower RPM Engine_revolutions_per_mile Manual_transmission_available Fuel_tank_capacity Passenger_capacity Length Wheelbase Width U-turn_space Rear_seat_room Luggage_capacity Weight Domestic class) :egs '( (Acura Small 25 31 0 1 4 1.8 140 6300 2890 1 13.2 5 177 102 68 37 26.5 11 2705 0 15.9) (Acura Midsize 18 25 2 1 6 3.2 200 5500 2335 1 18 5 195 115 71 38 30 15 3560 0 33.9) (Audi Compact 20 26 1 1 6 2.8 172 5500 2280 1 16.9 5 180 102 67 37 28 14 3375 0 29.1) (Audi Midsize 19 26 2 1 6 2.8 172 5500 2535 1 21.1 6 193 106 70 37 31 17 3405 0 37.7) (BMW Midsize 22 30 1 0 4 3.5 208 5700 2545 1 21.1 4 186 109 69 39 27 13 3640 0 30) (Buick Midsize 22 31 1 1 4 2.2 110 5200 2565 0 16.4 6 189 105 69 41 28 16 2880 1 15.7) (Buick Large 19 28 1 1 6 3.8 170 4800 1570 0 18 6 200 111 74 42 30.5 17 3470 1 20.8) (Buick Large 16 25 1 0 6 5.7 180 4000 1320 0 23 6 216 116 78 45 30.5 21 4105 1 23.7) (Buick Midsize 19 27 1 1 6 3.8 170 4800 1690 0 18.8 5 198 108 73 41 26.5 14 3495 1 26.3) (Cadillac Large 16 25 1 1 8 4.9 200 4100 1510 0 18 6 206 114 73 43 35 18 3620 1 34.7) (Cadillac Midsize 16 25 2 1 8 4.6 295 6000 1985 0 20 5 204 111 74 44 31 14 3935 1 40.1) (Chevrolet Compact 25 36 0 1 4 2.2 110 5200 2380 1 15.2 5 182 101 66 38 25 13 2490 1 13.4) (Chevrolet Compact 25 34 1 1 4 2.2 110 5200 2665 1 15.6 5 184 103 68 39 26 14 2785 1 11.4) (Chevrolet Sporty 19 28 2 0 6 3.4 160 4600 1805 1 15.5 4 193 101 74 43 25 13 3240 1 15.1) (Chevrolet Midsize 21 29 0 1 4 2.2 110 5200 2595 0 16.5 6 198 108 71 40 28.5 16 3195 1 15.9) (Chevrolet Van 18 23 0 1 6 3.8 170 4800 1690 0 20 7 178 110 74 44 30.5 ? 3715 1 16.3) (Chevrolet Van 15 20 0 2 6 4.3 165 4000 1790 0 27 8 194 111 78 42 33.5 ? 4025 1 16.6) (Chevrolet Large 17 26 1 0 8 5 170 4200 1350 0 23 6 214 116 77 42 29.5 20 3910 1 18.8) (Chevrolet Sporty 17 25 1 0 8 5.7 300 5000 1450 1 20 2 179 96 74 43 ? ? 3380 1 38) (Chrysler Large 20 28 2 1 6 3.3 153 5300 1990 0 18 6 203 113 74 40 31 15 3515 1 18.4) (Chrysler Compact 23 28 2 1 4 3 141 5000 2090 0 16 6 183 104 68 41 30.5 14 3085 1 15.8) (Chrysler Large 20 26 1 1 6 3.3 147 4800 1785 0 16 6 203 110 69 44 36 17 3570 1 29.5) (Dodge Small 29 33 0 1 4 1.5 92 6000 3285 1 13.2 5 174 98 66 32 26.5 11 2270 1 9.2) (Dodge Small 23 29 1 1 4 2.2 93 4800 2595 1 14 5 172 97 67 38 26.5 13 2670 1 11.3) (Dodge Compact 22 27 1 1 4 2.5 100 4800 2535 1 16 6 181 104 68 39 30.5 14 2970 1 13.3) (Dodge Van 17 21 1 2 6 3 142 5000 1970 0 20 7 175 112 72 42 26.5 ? 3705 1 19) (Dodge Midsize 21 27 1 1 4 2.5 100 4800 2465 0 16 6 192 105 69 42 30.5 16 3080 1 15.6) (Dodge Sporty 18 24 1 2 6 3 300 6000 2120 1 19.8 4 180 97 72 40 20 11 3805 1 25.8) (Eagle Small 29 33 0 1 4 1.5 92 6000 2505 1 13.2 5 174 98 66 36 26.5 11 2295 1 12.2) (Eagle Large 20 28 2 1 6 3.5 214 5800 1980 0 18 6 202 113 74 40 30 15 3490 1 19.3) (Ford Small 31 33 0 1 4 1.3 63 5000 3150 1 10 4 141 90 63 33 26 12 1845 1 7.4) (Ford Small 23 30 0 1 4 1.8 127 6500 2410 1 13.2 5 171 98 67 36 28 12 2530 1 10.1) (Ford Compact 22 27 0 1 4 2.3 96 4200 2805 1 15.9 5 177 100 68 39 27.5 13 2690 1 11.3) (Ford Sporty 22 29 1 0 4 2.3 105 4600 2285 1 15.4 4 180 101 68 40 24 12 2850 1 15.9) (Ford Sporty 24 30 1 1 4 2 115 5500 2340 1 15.5 4 179 103 70 38 23 18 2710 1 14) (Ford Van 15 20 1 2 6 3 145 4800 2080 1 21 7 176 119 72 45 30 ? 3735 1 19.9) (Ford Midsize 21 30 1 1 6 3 140 4800 1885 0 16 5 192 106 71 40 27.5 18 3325 1 20.2) (Ford Large 18 26 1 0 8 4.6 190 4200 1415 0 20 6 212 114 78 43 30 21 3950 1 20.9) (Geo Small 46 50 0 1 3 1 55 5700 3755 1 10.6 4 151 93 63 34 27.5 10 1695 0 8.4) (Geo Sporty 30 36 1 1 4 1.6 90 5400 3250 1 12.4 4 164 97 67 37 24.5 11 2475 0 12.5) (Honda Sporty 24 31 2 1 4 2.3 160 5800 2855 1 15.9 4 175 100 70 39 23.5 8 2865 0 19.8) (Honda Small 42 46 1 1 4 1.5 102 5900 2650 1 11.9 4 173 103 67 36 28 12 2350 0 12.1) (Honda Compact 24 31 2 1 4 2.2 140 5600 2610 1 17 4 185 107 67 41 28 14 3040 0 17.5) (Hyundai Small 29 33 0 1 4 1.5 81 5500 2710 1 11.9 5 168 94 63 35 26 11 2345 0 8) (Hyundai Small 22 29 0 1 4 1.8 124 6000 2745 1 13.7 5 172 98 66 36 28 12 2620 0 10) (Hyundai Sporty 26 34 0 1 4 1.5 92 5550 2540 1 11.9 4 166 94 64 34 23.5 9 2285 0 10) (Hyundai Midsize 20 27 0 1 4 2 128 6000 2335 1 17.2 5 184 104 69 41 31 14 2885 0 13.9) (Infiniti Midsize 17 22 1 0 8 4.5 278 6000 1955 0 22.5 5 200 113 72 42 29 15 4000 0 47.9) (Lexus Midsize 18 24 1 1 6 3 185 5200 2325 1 18.5 5 188 103 70 40 27.5 14 3510 0 28) (Lexus Midsize 18 23 2 0 6 3 225 6000 2510 1 20.6 4 191 106 71 39 25 9 3515 0 35.2) (Lincoln Midsize 17 26 2 1 6 3.8 160 4400 1835 0 18.4 6 205 109 73 42 30 19 3695 1 34.3) (Lincoln Large 18 26 2 0 8 4.6 210 4600 1840 0 20 6 219 117 77 45 31.5 22 4055 1 36.1) (Mazda Small 29 37 0 1 4 1.6 82 5000 2370 1 13.2 4 164 97 66 34 27 16 2325 0 8.3) (Mazda Small 28 36 0 1 4 1.8 103 5500 2220 1 14.5 5 172 98 66 36 26.5 13 2440 0 11.6) (Mazda Compact 26 34 1 1 4 2.5 164 5600 2505 1 15.5 5 184 103 69 40 29.5 14 2970 0 16.5) (Mazda Van 18 24 0 2 6 3 155 5000 2240 0 19.6 7 190 110 72 39 27.5 ? 3735 0 19.1) (Mazda Sporty 17 25 1 0 ? 1.3 255 6500 2325 1 20 2 169 96 69 37 ? ? 2895 0 32.5) (Mercedes-Benz Compact 20 29 1 0 4 2.3 130 5100 2425 1 14.5 5 175 105 67 34 26 12 2920 0 31.9) (Mercedes-Benz Midsize 19 25 2 0 6 3.2 217 5500 2220 0 18.5 5 187 110 69 37 27 15 3525 0 61.9) (Mercury Sporty 23 26 1 1 4 1.6 100 5750 2475 1 11.1 4 166 95 65 36 19 6 2450 1 14.1) (Mercury Midsize 19 26 0 0 6 3.8 140 3800 1730 0 18 5 199 113 73 38 28 15 3610 1 14.9) (Mitsubishi Small 29 33 0 1 4 1.5 92 6000 2505 1 13.2 5 172 98 67 36 26 11 2295 0 10.3) (Mitsubishi Midsize 18 24 1 1 6 3 202 6000 2210 0 19 5 190 107 70 43 27.5 14 3730 0 26.1) (Nissan Small 29 33 1 1 4 1.6 110 6000 2435 1 13.2 5 170 96 66 33 26 12 2545 0 11.8) (Nissan Compact 24 30 1 1 4 2.4 150 5600 2130 1 15.9 5 181 103 67 40 28.5 14 3050 0 15.7) (Nissan Van 17 23 0 1 6 3 151 4800 2065 0 20 7 190 112 74 41 27 ? 4100 0 19.1) (Nissan Midsize 21 26 1 1 6 3 160 5200 2045 0 18.5 5 188 104 69 41 28.5 14 3200 0 21.5) (Oldsmobile Compact 24 31 0 1 4 2.3 155 6000 2380 0 15.2 5 188 103 67 39 28 14 2910 1 13.5) (Oldsmobile Midsize 23 31 1 1 4 2.2 110 5200 2565 0 16.5 5 190 105 70 42 28 16 2890 1 16.3) (Oldsmobile Van 18 23 0 1 6 3.8 170 4800 1690 0 20 7 194 110 74 44 30.5 ? 3715 1 19.5) (Oldsmobile Large 19 28 1 1 6 3.8 170 4800 1570 0 18 6 201 111 74 42 31.5 17 3470 1 20.7) (Plymouth Sporty 23 30 0 2 4 1.8 92 5000 2360 1 15.9 4 173 97 67 39 24.5 8 2640 1 14.4) (Pontiac Small 31 41 0 1 4 1.6 74 5600 3130 1 13.2 4 177 99 66 35 25.5 17 2350 1 9) (Pontiac Compact 23 31 0 1 4 2 110 5200 2665 1 15.2 5 181 101 66 39 25 13 2575 1 11.1) (Pontiac Sporty 19 28 2 0 6 3.4 160 4600 1805 1 15.5 4 196 101 75 43 25 13 3240 1 17.7) (Pontiac Midsize 19 27 0 1 6 3.4 200 5000 1890 1 16.5 5 195 108 72 41 28.5 16 3450 1 18.5) (Pontiac Large 19 28 2 1 6 3.8 170 4800 1565 0 18 6 177 111 74 43 30.5 18 3495 1 24.4) (Saab Compact 20 26 1 1 4 2.1 140 6000 2910 1 18 5 184 99 67 37 26.5 14 2775 0 28.7) (Saturn Small 28 38 1 1 4 1.9 85 5000 2145 1 12.8 5 176 102 68 40 26.5 12 2495 1 11.1) (Subaru Small 33 37 0 2 3 1.2 73 5600 2875 1 9.2 4 146 90 60 32 23.5 10 2045 0 8.4) (Subaru Small 25 30 0 2 4 1.8 90 5200 3375 1 15.9 5 175 97 65 35 27.5 15 2490 0 10.9) (Subaru Compact 23 30 1 2 4 2.2 130 5600 2330 1 15.9 5 179 102 67 37 27 14 3085 0 19.5) (Suzuki Small 39 43 0 1 3 1.3 70 6000 3360 1 10.6 4 161 93 63 34 27.5 10 1965 0 8.6) (Toyota Small 32 37 1 1 4 1.5 82 5200 3505 1 11.9 5 162 94 65 36 24 11 2055 0 9.8) (Toyota Sporty 25 32 1 1 4 2.2 135 5400 2405 1 15.9 4 174 99 69 39 23 13 2950 0 18.4) (Toyota Midsize 22 29 1 1 4 2.2 130 5400 2340 1 18.5 5 188 103 70 38 28.5 15 3030 0 18.2) (Toyota Van 18 22 1 2 4 2.4 138 5000 2515 1 19.8 7 187 113 71 41 35 ? 3785 0 22.7) (Volkswagen Small 25 33 0 1 4 1.8 81 5500 2550 1 12.4 4 163 93 63 34 26 10 2240 0 9.1) (Volkswagen Van 17 21 0 1 5 2.5 109 4500 2915 1 21.1 7 187 115 72 38 34 ? 3960 0 19.7) (Volkswagen Compact 21 30 0 1 4 2 134 5800 2685 1 18.5 5 180 103 67 35 31.5 14 2985 0 20) (Volkswagen Sporty 18 25 0 1 6 2.8 178 5800 2385 1 18.5 4 159 97 66 36 26 15 2810 0 23.3) (Volvo Compact 21 28 1 0 4 2.3 114 5400 2215 1 15.8 5 190 104 67 37 29.5 14 2985 0 22.7) (Volvo Midsize 20 28 2 1 5 2.4 168 6200 2310 1 19.3 5 184 105 69 38 30 15 3245 0 26.7) )))