In what follows use any of the following tests/procedures:Regression, multiple regression, confidence intervals, one sided T-test or two sided T-test. All the procedures should be done with 5% P-value or 95% confidence interval.Some answers are approximated, choose the most appropriate answer.OpenCars04data. SETUP:It is believed that BMW models have less horse power than the Mercedes models. Given the data your job is to confirm or disprove this assertion.

Vehicle Name Hybrid SuggestedRetailPrice DealerCost EngineSize Cylinders Horsepower CityMPG HighwayMPG Weight WheelBase Length Width Chevrolet Aveo 4dr 0 11690 10965 1.6 4 103 28 34 2370 98 167 66 Chevrolet Aveo LS 4dr hatch 0 12585 11802 1.6 4 103 28 34 2348 98 153 66 Chevrolet Cavalier 2dr 0 14610 13697 2.2 4 140 26 37 2617 104 183 69 Chevrolet Cavalier 4dr 0 14810 13884 2.2 4 140 26 37 2676 104 183 68 Chevrolet Cavalier LS 2dr 0 16385 15357 2.2 4 140 26 37 2617 104 183 69 Dodge Neon SE 4dr 0 13670 12849 2 4 132 29 36 2581 105 174 67 Dodge Neon SXT 4dr 0 15040 14086 2 4 132 29 36 2626 105 174 67 Ford Focus ZX3 2dr hatch 0 13270 12482 2 4 130 26 33 2612 103 168 67 Ford Focus LX 4dr 0 13730 12906 2 4 110 27 36 2606 103 168 67 Ford Focus SE 4dr 0 15460 14496 2 4 130 26 33 2606 103 168 67 Ford Focus ZX5 5dr 0 15580 14607 2 4 130 26 33 2691 103 168 67 Honda Civic DX 2dr 0 13270 12175 1.7 4 115 32 38 2432 103 175 67 Honda Civic HX 2dr 0 14170 12996 1.7 4 117 36 44 2500 103 175 67 Honda Civic LX 4dr 0 15850 14531 1.7 4 115 32 38 2513 103 175 68 Hyundai Accent 2dr hatch 0 10539 10107 1.6 4 103 29 33 2255 96 167 66 Hyundai Accent GL 4dr 0 11839 11116 1.6 4 103 29 33 2290 96 167 66 Hyundai Accent GT 2dr hatch 0 11939 11209 1.6 4 103 29 33 2339 96 167 66 Hyundai Elantra GLS 4dr 0 13839 12781 2 4 138 26 34 2635 103 178 68 Hyundai Elantra GT 4dr 0 15389 14207 2 4 138 26 34 2635 103 178 68 Hyundai Elantra GT 4dr hatch 0 15389 14207 2 4 138 26 34 2698 103 178 68 Kia Optima LX 4dr 0 16040 14910 2.4 4 138 23 30 3281 106 186 72 Kia Rio 4dr manual 0 10280 9875 1.6 4 104 26 33 2403 95 167 66 Kia Rio 4dr auto 0 11155 10705 1.6 4 104 25 32 2458 95 167 66 Kia Spectra 4dr 0 12360 11630 1.8 4 124 24 32 2661 101 178 68 Kia Spectra GS 4dr hatch 0 13580 12830 1.8 4 124 24 32 2686 101 178 68 Kia Spectra GSX 4dr hatch 0 14630 13790 1.8 4 124 24 32 2697 101 178 68 Mini Cooper 0 16999 15437 1.6 4 115 28 37 2524 97 143 67 Nissan Sentra 1.8 4dr 0 12740 12205 1.8 4 126 28 35 2513 100 178 67 Nissan Sentra 1.8 S 4dr 0 14740 13747 1.8 4 126 28 35 2581 100 178 67 Pontiac Sunfire 1SA 2dr 0 15495 14375 2.2 4 140 24 33 2771 104 182 68 Saturn Ion1 4dr 0 10995 10319 2.2 4 140 26 35 2692 103 185 67 Saturn lon2 4dr 0 14300 13393 2.2 4 140 26 35 2692 103 185 67 Saturn lon3 4dr 0 15825 14811 2.2 4 140 26 35 2692 103 185 67 Saturn lon2 quad coupe 2dr 0 14850 13904 2.2 4 140 26 35 2751 103 185 68 Saturn lon3 quad coupe 2dr 0 16350 15299 2.2 4 140 26 35 2751 103 185 68 Scion xA 4dr hatch 0 12965 12340 1.5 4 108 32 38 2340 93 154 67 Suzuki Aeno S 4dr 0 12884 12719 2.3 4 155 25 31 2676 98 171 68 Suzuki Aerio LX 4dr 0 14500 14317 2.3 4 155 25 31 2676 98 171 68 Suzuki Forenza S 4dr 0 12269 12116 2 4 119 24 31 2701 102 177 68 Suzuki Forenza EX 4dr 0 15568 15378 2 4 119 22 30 2756 102 177 68 Toyota Corolla CE 4dr 0 14085 13065 1.8 4 130 32 40 2502 102 178 67 Toyota Corolla S 4dr 0 15030 13650 1.8 4 130 32 40 2524 102 178 67 Toyota Corolla LE 4dr 0 15295 13889 1.8 4 130 32 40 2524 102 178 67 Toyota Echo 2dr manual 0 10760 10144 1.5 4 108 35 43 2035 93 163 65 Toyota Echo 2dr auto 0 11560 10896 1.5 4 108 33 39 2085 93 163 65 Toyota Echo 4dr 0 11290 10642 1.5 4 108 35 43 2055 93 163 65 Buick Century Custom 4dr 0 22180 20351 3.1 6 175 20 30 3353 109 195 73 Chevrolet Impala 4dr 0 21900 20095 3.4 6 180 21 32 3465 111 200 73 Chevrolet Malibu 4dr 0 18995 17434 2.2 4 145 24 34 3174 106 188 70 Chevrolet Malibu LS 4dr 0 20370 18639 3.5 6 200 22 30 3297 106 188 70 Chevrolet Monte Carlo LS 2dr 0 21825 20026 3.4 6 180 21 32 3340 111 198 73 Chrysler PT Cruiser 4dr 0 17985 16919 2.4 4 150 22 29 3101 103 169 67 Chrysler PT Cruiser Limited 4dr 0 22000 20573 2.4 4 150 22 29 3105 103 169 67 Chrysler Sebring 4dr 0 19090 17805 2.4 4 150 22 30 3173 108 191 71 Chrysler Sebring Touring 4dr 0 21840 20284 2.7 6 200 21 28 3222 108 191 71 Dodge Intrepid SE 4dr 0 22035 20502 2.7 6 200 21 29 3469 113 204 75 Dodge Stratus SXT 4dr 0 18820 17512 2.4 4 150 21 28 3182 108 191 71 Dodge Stratus SE 4dr 0 20220 18821 2.4 4 150 21 28 3175 108 191 71 Ford Focus SVT 2dr 0 19135 17878 2 4 170 21 28 2750 103 168 67 Ford Taurus LX 4dr 0 20320 18881 3 6 155 20 27 3306 109 198 73 Ford Taurus SES Duratec 4dr 0 22735 20857 3 6 201 19 26 3313 109 198 73 Honda Accord LX 2dr 0 19860 17924 2.4 4 160 26 34 2994 105 188 71 Honda Accord EX 2dr 0 22260 20080 2.4 4 160 26 34 3047 105 188 71 Honda Civic EX 4dr 0 17750 16265 1.7 4 127 32 37 2601 103 175 68 Honda Civic Si 2dr hatch 0 19490 17849 2 4 160 26 30 2782 101 166 67 Honda Civic Hybrid 4dr manual (gas/electric) 1 20140 18451 1.4 4 93 46 51 2732 103 175 68 Honda Insight 2dr (gas/electric) 1 19110 17911 2 3 73 60 66 1850 95 155 67 Hyundai Sonata GLS 4dr 0 19339 17574 2.7 6 170 19 27 3217 106 187 72 Hyundai Sonata LX 4dr 0 20339 18380 2.7 6 170 19 27 3217 106 187 72 Kia Optima LX V6 4dr 0 18435 16850 2.7 6 170 20 27 3279 106 186 72 Mazda6 i 4dr 0 19270 17817 2.3 4 160 24 32 3042 105 187 70 Mercury Sable GS 4dr 0 21595 19848 3 6 155 20 27 3308 109 200 73 Mini Cooper S 0 19999 18137 1.6 4 163 25 34 2678 97 144 67 Nissan Altima S 4dr 0 19240 18030 2.5 4 175 21 26 3039 110 192 70 Nissan Sentra SE-R 4dr 0 17640 16444 2.5 4 165 23 28 2761 100 178 67 Oldsmobile Alero GX 2dr 0 18825 17642 2.2 4 140 24 32 2946 107 187 70 Pontiac Grand Am GT 2dr 0 22450 20595 3.4 6 175 20 29 3118 107 186 70 Pontiac Grand Prix GT1 4dr 0 22395 20545 3.8 6 200 20 30 3477 111 198 74 Pontiac Sunfire 1SC 2dr 0 17735 16369 2.2 4 140 24 33 2771 104 182 68 Saturn L300-2 4dr 0 21410 19801 3 6 182 20 28 3197 107 190 69 Subaru Impreza 2.5 RS 4dr 0 19945 18399 2.5 4 165 22 28 2965 99 174 69 Subaru Legacy L 4dr 0 20445 18713 2.5 4 165 21 28 3285 104 184 69 Suzuki Verona LX 4dr 0 17262 17053 2.5 6 155 20 27 3380 106 188 72 Toyota Camry LE 4dr 0 19560 17558 2.4 4 157 24 33 3086 107 189 71 Toyota Camry LE V6 4dr 0 22775 20325 3 6 210 21 29 3296 107 189 71 Toyota Camry Solara SE 2dr 0 19635 17722 2.4 4 157 24 33 3175 107 193 72 Toyota Camry Solara SE V6 2dr 0 21965 19819 3.3 6 225 20 29 3417 107 193 72 Toyota Prius 4dr (gas/electric) 1 20510 18926 1.5 4 110 59 51 2890 106 175 68 Volkswagen Golf GLS 4dr 0 18715 17478 2 4 115 24 31 2897 99 165 68 Volkswagen GTI 1.8T 2dr hatch 0 19825 18109 1.8 4 180 24 31 2934 99 168 68 Volkswagen Jetta GLS TDI 4dr 0 21055 19638 1.9 4 100 38 46 3003 99 172 68 Volkswagen New Beetle GLS 1.8T 2dr 0 21055 19638 1.8 4 150 24 31 2820 99 161 68 Acura RSX Type S 2dr 0 23820 21761 2 4 200 24 31 2778 101 172 68 Acura TSX 4dr 0 26990 24647 2.4 4 200 22 29 3230 105 183 69 Audi A4 1.8T 4dr 0 25940 23508 1.8 4 170 22 31 3252 104 179 70 BMW 325i 4dr 0 28495 26155 2.5 6 184 20 29 3219 107 176 69 Buick LeSabre Custom 4dr 0 26470 24282 3.8 6 205 20 29 3567 112 200 74 Buick Regal LS 4dr 0 24895 22835 3.8 6 200 20 30 3461 109 196 73 Buick Regal GS 4dr 0 28345 26047 3.8 6 240 18 28 3536 109 196 73 Chevrolet Impala LS 4dr 0 25000 22931 3.8 6 200 20 30 3476 111 200 73 Chevrolet Impala SS 4dr 0 27995 25672 3.8 6 240 18 28 3606 111 200 73 Chevrolet Malibu LT 4dr 0 23495 21551 3.5 6 200 23 32 3315 106 188 70 Chevrolet Monte Carlo SS 2dr 0 24225 22222 3.8 6 200 18 28 3434 111 198 73 Chrysler 300M 4dr 0 29865 27797 3.5 6 250 18 27 3581 113 198 74 Chrysler Concorde LX 4dr 0 24130 22452 2.7 6 200 21 29 3479 113 208 74 Chrysler Concorde LXi 4dr 0 26860 24909 3.5 6 232 19 27 3548 113 208 74 Chrvsler PT Cruiser GT 4dr 0 25955 24172 2.4 4 220 21 27 3217 103 169 67 Chrysler Sebring convertible 2dr 0 25215 23451 2.4 4 150 22 30 3357 106 194 64 Dodge Intrepid ES 4dr 0 24885 23058 3.5 6 232 18 27 3487 113 204 75 Ford Crown Victoria 4dr 0 24345 22856 4.6 8 224 17 25 4057 115 212 78 Ford Crown Victoria LX 4dr 0 27370 25105 4.6 8 224 17 25 4057 115 212 78 Honda Accord LX V6 4dr 0 23760 21428 3 6 240 21 30 3349 108 190 72 Honda Accord EX V6 2dr 0 26960 24304 3 6 240 21 30 3294 105 188 71 Hyundai XG350 4dr 0 24589 22055 3.5 6 194 17 26 3651 108 192 72 Hyundai XG350 L 4dr 0 26189 23486 3.5 6 194 17 26 3651 108 192 72 Infiniti G35 4dr 0 28495 26157 3.5 6 260 18 26 3336 112 187 69 Infiniti G35 Sport Coupe 2dr 0 29795 27536 3.5 6 280 18 26 3416 112 182 72 Jaguar X-Type 2.5 4dr 0 29995 27355 2.5 6 192 18 26 3428 107 184 70 Mercedes-Benz C230 Sport 2dr 0 26060 24249 1.8 4 189 22 30 3250 107 178 68 Mercedes-Benz C320 Sport 2dr 0 28370 26435 3.2 6 215 19 26 3430 107 178 68 Mercury Grand Marquis GS 4dr 0 24695 23217 4.6 8 224 17 25 4052 115 212 78 Mercury Grand Marquis LS Premium 4dr 0 29595 27148 4.6 8 224 17 25 4052 115 212 78 Mercury Sable LS Premium 4dr 0 23895 21918 3 6 201 19 26 3315 109 200 73 Mitsubishi Diamante LS 4dr 0 29282 27250 3.5 6 205 18 25 3549 107 194 70 Mitsubishi Galant GTS 4dr 0 25700 23883 3.8 6 230 18 26 3649 108 191 72 Nissan Altima SE 4dr 0 23290 21580 3.5 6 245 21 26 3197 110 192 70 Nissan Maxima SE 4dr 0 27490 25182 3.5 6 265 20 28 3473 111 194 72 Nissan Maxima SL 4dr 0 29440 26966 3.5 6 265 20 28 3476 111 194 72 Oldsmobile Alero GLS 2dr 0 23675 21485 3.4 6 170 20 29 3085 107 187 70 Pontiac Grand Prix GT2 4dr 0 24295 22284 3.8 6 200 20 30 3484 111 198 74 Subaru Legacy GT 4dr 0 25645 23336 2.5 4 165 21 28 3395 104 184 69 Subaru Outback Limited Sedan 4dr 0 27145 24687 2.5 4 165 20 27 3495 104 184 69 Subaru Outback H6 4dr 0 29345 26660 3 6 212 19 26 3610 104 184 69 Toyota Avalon XL 4dr 0 26560 23693 3 6 210 21 29 3417 107 192 72 Toyota Camry XLE V6 4dr 0 25920 23125 3 6 210 21 29 3362 107 189 71 Toyota Camry Solara SLE V6 2dr 0 26510 23908 3.3 6 225 20 29 3439 107 193 72 Volkswagen Jetta GLI VR6 4dr 0 23785 21686 2.8 6 200 21 30 3179 99 172 68 Volkswagen New Beetle GLS convertible 2dr 0 23215 21689 2 4 115 24 30 3082 99 161 68 Volkswagen Passat GLS 4dr 0 23955 21898 1.8 4 170 22 31 3241 106 185 69 Volvo S40 4dr 0 25135 23701 1.9 4 170 22 29 2767 101 178 68 Acura TL 4dr 0 33195 30299 3.2 6 270 20 28 3575 108 186 72 Audi A41.8T convertible 2dr 0 35940 32506 1.8 4 170 23 30 3638 105 180 70 Audi A4 3.0 4dr 0 31840 28846 3 6 220 20 28 3462 104 179 70 Audi A4 3.0 Quattro 4dr manual 0 33430 30366 3 6 220 17 26 3583 104 179 70 Audi A4 3.0 Quattro 4dr auto 0 34480 31388 3 6 220 18 25 3627 104 179 70 Audi A6 3.0 4dr 0 36640 33129 3 6 220 20 27 3561 109 192 71 Audi A6 3.0 Quattro 4dr 0 39640 35992 3 6 220 18 25 3880 109 192 71 BMW 325Ci 2dr 0 30795 28245 2.5 6 184 20 29 3197 107 177 69 BMW 325Ci convertible 2dr 0 37995 34800 2.5 6 184 19 27 3560 107 177 69 BMW 325xi 4dr 0 30245 27745 2.5 6 184 19 27 3461 107 176 69 BMW 330i 4dr 0 35495 32525 3 6 225 20 30 3285 107 176 69 BMW 330Ci 2dr 0 36995 33890 3 6 225 20 30 3285 107 176 69 BMW 330xi 4dr 0 37245 34115 3 6 225 20 29 3483 107 176 69 BMW 525i 4dr 0 39995 36620 2.5 6 184 19 28 3428 114 191 73 Buick LeSabre Limited 4dr 0 32245 29566 3.8 6 205 20 29 3591 112 200 74 Buick Park Avenue 4dr 0 35545 32244 3.8 6 205 20 29 3778 114 207 75 Cadillac CTS VVT 4dr 0 30835 28575 3.6 6 255 18 25 3694 113 190 71 Chrysler 300M Special Edition 4dr 0 33295 30884 3.5 6 255 18 27 3650 113 198 74 Chrysler Sebring Limited convertible 2dr 0 30950 28613 2.7 6 200 21 28 3448 106 194 69 Ford Crown Victoria LX Sport 4dr 0 30315 27756 4.6 8 239 17 25 4057 115 212 78 Infiniti G35 4dr 0 32445 29783 3.5 6 260 18 26 3677 112 187 69 Infiniti I35 4dr 0 31145 28320 3.5 6 255 19 26 3306 108 194 70 Jaguar X-Type 3.0 4dr 0 33995 30995 3 6 227 18 25 3516 107 184 70 Lexus ES 330 4dr 0 32350 28755 3.3 6 225 20 29 3460 107 191 71 Lexus IS 300 4dr manual 0 31045 27404 3 6 215 18 25 3255 105 177 68 Lexus IS 300 4dr auto 0 32415 28611 3 6 215 18 24 3285 105 177 68 Lincoln LS V6 Luxury 4dr 0 32495 29969 3 6 232 20 26 3681 115 194 73 Lincoln LS V6 Premium 4dr 0 36895 33929 3 6 232 20 26 3681 115 194 73 Mercedes-Benz C240 4dr 0 32280 30071 2.6 6 168 20 25 3360 107 178 68 Mercedes-Benz C240 4dr 0 33480 31187 2.6 6 168 19 25 3360 107 178 68 Mercedes-Benz C320 Sport 4dr 0 35920 33456 3.2 6 215 19 26 3430 107 178 68 Mercedes-Benz C320 4dr 0 37630 35046 3.2 6 215 20 26 3450 107 178 68 Mercury Grand Marquis LS Ultimate 4dr 0 30895 28318 4.6 8 224 17 25 4052 115 212 78 Mercury Marauder 4dr 0 34495 31558 4.6 8 302 17 23 4195 115 212 78 Saab 9-3 Arc Sport 4dr 0 30860 29269 2 4 210 20 28 3175 105 183 69 Saab 9-3 Aero 4dr 0 33360 31562 2 4 210 20 28 3175 105 183 69 Saab 9-5 Arc 4dr 0 35105 33011 2.3 4 220 21 29 3470 106 190 71 Saab 9-5 Aero 4dr 0 39465 37721 2.3 4 250 21 29 3470 106 190 71 Subaru Outback H-6 VDC 4dr 0 31545 28603 3 6 212 19 26 3630 104 184 69 Toyota Avalon XLS 4dr 0 30920 27271 3 6 210 21 29 3439 107 192 72 Volkswagen Passat GLX V6 4MOTION 4dr 0 33180 30583 2.8 6 190 19 26 3721 106 185 69 Volkswagen Passat W8 4MOTION 4dr 0 39235 36052 4 8 270 18 25 3953 106 185 69 Volvo S60 2.5 4dr 0 31745 29916 2.5 5 208 20 27 3903 107 180 71 Volvo S60 T5 4dr 0 34845 32902 2.3 5 247 20 28 3766 107 180 71 Volvo S60 R 4dr 0 37560 35382 2.5 5 300 18 25 3571 107 181 71 Volvo S80 2.9 4dr 0 37730 35542 2.9 6 208 20 28 3576 110 190 72 Volvo S80 2.5T 4dr 0 37885 35688 2.5 5 194 20 27 3691 110 190 72 Acura 3.5 RL 4dr 0 43755 39014 3.5 6 225 18 24 3880 115 197 72 Acura 3.5 RL w/Navigation 4dr 0 46100 41100 3.5 6 225 18 24 3893 115 197 72 Audi A4 3.0 convertible 2dr 0 42490 38325 3 6 220 20 27 3814 105 180 70 Audi A4 3.0 Quattro convertible 2dr 0 44240 40075 3 6 220 18 25 4013 105 180 70 Audi A6 2.7 Turbo Quattro 4dr 0 42840 38840 2.7 6 250 18 25 3836 109 192 71 Audi A6 4.2 Quattro 4dr 0 49690 44936 4.2 8 300 17 24 4024 109 193 71 Audi A8 L Quattro 4dr 0 69190 64740 4.2 8 330 17 24 4399 121 204 75 Audi S4 Quattro 4dr 0 48040 43556 4.2 8 340 14 20 3825 104 179 70 BMW 330Ci convertible 2dr 0 44295 40530 3 6 225 19 28 3616 107 177 69 BMW 530i 4dr 0 44995 41170 3 6 225 20 30 3472 114 191 73 BMW 545iA 4dr 0 54995 50270 4.4 8 325 18 26 3814 114 191 73 BMW 745i 4dr 0 69195 63190 4.4 8 325 18 26 4376 118 198 75 BMW 745Li 4dr 0 73195 66830 4.4 8 325 18 26 4464 123 204 75 Buick Park Avenue Ultra 4dr 0 40720 36927 3.8 6 240 18 28 3909 114 207 75 Cadillac Deville 4dr 0 45445 41650 4.6 8 275 18 26 3984 115 207 74 Cadillac Deville DTS 4dr 0 50595 46362 4.6 8 300 18 26 4044 115 207 74 Cadillac Seville SLS 4dr 0 47955 43841 4.6 8 275 18 26 3992 112 201 75 Infiniti M45 4dr 0 42845 38792 4.5 8 340 17 23 3851 110 197 70 Infiniti Q45 Luxury 4dr 0 52545 47575 4.5 8 340 17 23 3977 113 200 73 Jaguar S-Type 3.0 4dr 0 43895 40004 3 6 235 18 26 3777 115 192 72 Jaguar S-Type 4.2 4dr 0 49995 45556 4.2 8 294 18 28 3874 115 192 72 Jaguar S-Type R 4dr 0 63120 57499 4.2 8 390 17 24 4046 115 192 72 Jaguar Vanden Plas 4dr 0 68995 62846 4.2 8 294 18 28 3803 119 200 73 Jaguar XJ8 4dr 0 59995 54656 4.2 8 294 18 28 3803 119 200 73 Jaguar XJR 4dr 0 74995 68306 4.2 8 390 17 24 3948 119 200 73 Lexus GS 300 4dr 0 41010 36196 3 6 220 18 25 3649 110 189 71 Lexus GS 430 4dr 0 48450 42232 4.3 8 300 18 23 3715 110 189 71 Lexus LS 430 4dr 0 55750 48583 4.3 8 290 18 25 3990 115 197 72 Lincoln LS V8 Sport 4dr 0 40095 36809 3.9 8 280 17 24 3768 115 194 73 Lincoln LS V8 Ultimate 4dr 0 43495 39869 3.9 8 280 17 24 3768 115 194 73 Lincoln Town Car Signature 4dr 0 41815 38418 4.6 8 239 17 25 4369 118 215 78 Lincoln Town Car Ultimate 4dr 0 44925 41217 4.6 8 239 17 25 4369 118 215 78 Lincoln Town Car Ultimate L 4dr 0 50470 46208 4.6 8 239 17 25 4474 124 221 78 Mercedes-Benz C32 AMG 4dr 0 52120 48522 3.2 6 349 16 21 3540 107 178 68 Mercedes-Benz CL500 2dr 0 94820 88324 5 8 302 16 24 4085 114 196 73 Mercedes-Benz CL600 2dr 0 128420 119600 5.5 12 493 13 19 4473 114 196 73 Mercedes-Benz CLK320 coupe 2dr (convertible) 0 45707 41966 3.2 6 215 20 26 3770 107 183 69 Mercedes-Benz CLK500 coupe 2dr (convertible) 0 52800 49104 5 8 302 17 22 3585 107 183 69 Mercedes-Benz E320 4dr 0 48170 44849 3.2 6 221 19 27 3635 112 190 71 Mercedes-Benz E500 4dr 0 57270 53382 5 8 302 16 20 3815 112 190 71 Mercedes-Benz S430 4dr 0 74320 69168 4.3 8 275 18 26 4160 122 203 73 Mercedes-Benz S500 4dr 0 86970 80939 5 8 302 16 24 4390 122 203 73 Saab 9-3 Arc convertible 2dr 0 40670 38520 2 4 210 21 29 3480 105 182 69 Saab 9-3 Aero convertible 2dr 0 43175 40883 2 4 210 21 30 3700 105 182 69 Volvo C70 LPT convertible 2dr 0 40565 38203 2.4 5 197 21 28 3450 105 186 72 Volvo C70 HPT convertible 2dr 0 42565 40083 2.3 5 242 20 26 3450 105 186 72 Volvo S80 T6 4dr 0 45210 42573 2.9 6 268 19 26 3653 110 190 72 

I) What test/procedure did you perform? (6.66 points)

• a. One sided T-test
• b. Two sided T-test
• c. Regression
• d. Confidence interval

II. Statistical interpretation? (6.66 points)

• a. Since P-value is small we are confident that the slope is not zero.
• b. Since P-value is small we are confident that the averages are different.
• c. Since P-value is too large the test is inconclusive.
• d. None of these.

III. Conclusion? (6.66 points)

• a. Yes, we can confirm the assertion.
• b. No, we cannot confirm the assertion.