Question:
Table E12-3 provides the highway gasoline mileage test results for 2005 model year vehicles from DaimlerChrysler.
The full table of data (available on the books Web site) contains the same data for 2005 models from over 250 vehicles from many manufacturers (Environmental Protection Agency Web site www.epa.gov/ otaq/cert/mpg/testcars/database).
(a) Fit a multiple linear regression model to these data to estimate gasoline mileage that uses the following regressors:
cid, rhp, etw, cmp, axle, n/v
(b) Estimate Ï2 and the standard errors of the regression coefficients.
(c) Predict the gasoline mileage for the first vehicle in the table.
Transcribed Image Text:
car/ со со2 трg mfr carline truck cid rhp trns drv od etw cmp axle n/v a/c he 20 300C/SRT-8 215 253 L5 4 2 4500 9.9 3.07 30.9 Y 0.011 0.09 288 30.8 20 CARAVAN 2WD T 201 180 L4 2 4500 9.3 2.49 32.3 Y 0.014 0.11 274 32.5 20 CROSSFIRE ROADSTER 196 168 L5 2 3375 10 3.27 37.1 Y 0.001 0.02 250 35.4 20 DAKOTA PICKUP 2WD т 226 210 L4 2 4500 9.2 3.55 29.6 Y 0.012 0.04 316 28.1 20 DAKOTA PICKUP 4WD 226 210 L4 2 5000 9.2 3.55 29.6 Y 0.011 0.05 365 24.4 20 DURANGO 2WD 348 345 L5 2 5250 8.6 3.55 27.2 Y 0.023 0.15 367 24.1 20 GRAND CHEROKEE 2WD т 226 210 L4 2 4500 9.2 3.07 30.4 Y 0.006 0.09 312 28.5 9 3.07 24.7 Y 0.008 0.11 369 24.2 2 5000 20 GRAND CHEROKEE 4WD 348 230 L5 2 4000 9.5 4.1 20 LIBERTY/CHEROKEE 2WD 148 150 M6 41 Y 0.004 0.41 270 32.8 20 LIBERTY/CHEROKEE 4WD 226 210 LA 2 4250 9.2 3.73 31.2 Y 0.003 0.04 317 28 20 NEON/SRT-4/SX 2.0 122 132 L4 2 3000 9.8 2.69 39.2 Y 0.003 0.16 214 41.3 20 PACIFICA 2WD т 215 249 L4 2 4750 9.9 2.95 35.3 Y 0.022 0.01 295 30 215 249 20 PACIFICA AWD L4 4 2 5000 9.9 2.95 35.3 Y 0.024 0.05 314 28.2 20 PT CRUISER т 148 220 L4 3625 9.5 2.69 37.3 Y 0.002 0.03 260 34.1 20 RAM 1500 PICKUP 2WD 500 500 M6 2 5250 9.6 4.1 22.3 Y 0.01 0.1 474 18.7 29 Y 0 0 0 20.3 20 RAM 1500 PICKUP 4WD 348 345 L5 2 6000 8.6 3.92 20 SEBRING 4-DR 165 200 LA 2 3625 9.7 2.69 36.8 Y 0.011 0.12 252 35.1 20 STRATUS 4-DR 148 167 L4 3500 9.5 2.69 36.8 Y 0.002 0.06 233 37.9 20 TOWN & COUNTRY 2WD 148 150 L4 2 4250 9.4 2.69 34.9 Y 0.09 262 33.8 20 VIPER CONVERTIBLE 500 501 M6 2 3750 9.6 3.07 19.4 Y 0.007 0.05 342 25.9 148 150 M6 2 3625 9.5 3.73 40.1 Y 0.004 0.43 337 26.4 20 WRANGLER/TJ 4WD