MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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Transcribed Image Text:4.4 Consider the multiple regression model fit to the gasoline mileage data.
TABLE B.3 Gasoline Mileage Performance for 32 Antomobiles
Automobile y X₁ X₂ X3 X4
X₁
X
X10 X11
Apollo
18.90 350
17.00 350
165 260 8.0:1
170 275 8.5:1
Omega
Nova
20.00 250
105 185 8.25:1 2.73:1
2.56:1 4 3 200.3 69.9 3910 A
2.56:1 43 199.6 72.9 2860 A
13 196.7 72.2 3510 A
199.9 74.0 3890 A
194.1 71.8 3365 M
184.5 69
Monarch
18.25 351
143 255 8.0:1
3.00:1 23
Duster
20.07 225
95 170 8.4:1 2.76:1 13
2.88:1
Jenson
11.2 440 215 330 8.2:1
4215 A
Conv.
Skyhawk
22.12 231
110 175 8.0:1 2.56:1
3020 A
179.3 65.4
179.3 65.4
21.47 262 110 200 8.5:1
2.56:1
3180 A
Monza
Scirocco
1905 M
34.70 89.7 70 81 8.2:1 3.90:1 2
30.40 96.9 75 83 9.0:1
155.7 64
165.2 65
Corolla
4.30:1
2320 M
SR-5
Camaro
3.08:1
3 195.4 74.4
3885 A
16.50 350 155 250 8.5:1
36.50 85.3 80 83 8.5:1
Datsun
3.89:1 2
160.6 62.2 2009 M
B210
Capri II
Pacer
21.50 171 109 146 8.2:1
19.70 258 110 195 8.0:1
Babcat 20.30 140 83 109 8.4:1
Granada 17.80 302 129 220 8.0:1
Eldorado 14.39 500
Imperial
14.89 440
Nova LN
17.80 350
Valiant 16.41 318
23.54 231
3
3
3
2 3
23
Starfire
Cordoba
Trans AM
Corolla E-5
Astre
Mark IV
Celica GT
3.22:1 2 4 170.4 66.9 2655 M
3.08:1 13 171.5 77 3375 A
3.40:1 24 168.8 69.4 2700 M
3.0:1 2 3 199.9 74 3890 A
190 360 8.5:1 2.73:1 4 3 224.1 79.8 5290 A
215 330 8.2:1 2.71:1 4
231.0 79.7 5185 A
155 250 8.5:1 3.08:1
196.7 72.2 3910 A
145 255 8.5:1 2.45:1
197.6 71 3660 A
110 175 8.0:1 2.56:1
179.3 65.4 3050 A
21.47 360 180 290 8.4:1 2.45:1
214.2 76.3 4250 A
16.59 400 185 NA 7.6:1 3.08:1 43 196 73 3850 A
31.90 96.9 75 83 9.0:1 4.30:1 2 5 165.2 61.8 2275 M
29.40 140 86 NA 8.0:1 2.92:1 24 176.4 65.4 2150 M
13.27 460 223 366 8.0:1 3.00:1 43 228 79.8 5430 A
23.90 133.6 96 120 8.4:1 3.91:1 2 5 171.5 63.4 2535 M
19.73 318 140 255 8.5:1 2.71:1 2 3 215.3 76.3 4370 A
13.90 351 148 243 8.0:1 3.25:1 2 3 215.5 78.5 4540 A
13.27 351 148 243 8.0:1 3.26:1 2 3 216.1 78.5 4715 A
13.77 360 195 295 8.25:1 3.15:1 43 209.3 77.4 4215 A
16.50 350 165 255 8.5:1 2.73:1 4 3 185.2 69 3660 A
Charger SE
Cougar
Elite
Matador
Corvette
a. Construct a normal probability plot of the residuals. Does there seem to be any
problem with the normality assumption?
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