Assignment:
Find the regression equation, letting the first variable be the predictor (x) variable. Find the indicated predicted values following the prediction procedure summarized in Figure 10-5.
Car Weight and Braking Distance Refer to Data Set 16 in Appendix B and use the weights of cars and the corresponding braking distances. Find the best predicted braking distance for a car that weighs 4000 lb.
Data Set: Cars
The car weights are in pounds, the lengths are in inches, the braking distances are the distances in feet required to stop from 60 mi/h, the displacements are in liters, the city fuel consumption amounts are in miles per gallon, the highway fuel consumption amounts are in miles per gallon, and GHG denotes greenhouse gas emissions in tons per year, expressed as CO2 equivalents.
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STATDISK:
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Data set name is Cars.
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Minitab:
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Worksheet name is CARS.MTW.
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Excel:
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Workbook name is CARS.XLS.
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TI-83/84 Plus:
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App name is CARS and the file names are
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the same as for text files.
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Text file names:
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CRWT, CRLEN, CRBRK, CRCYL, CRDSP, CRCTY,
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CRHWY, CRGHG.
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Car
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Weight
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Length
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Braking
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Cylinders
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Disp
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City
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Hwy
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GHG
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Acura RL
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4035
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194
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131
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6
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3.5
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18
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26
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8.7
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Acura TSX
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3315
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183
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136
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4
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2.4
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22
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31
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7.2
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Audi A6
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4115
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194
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129
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6
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3.2
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21
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29
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7.7
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BMW 525i
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3650
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191
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127
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6
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3.0
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21
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29
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7.7
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Buick LaCrosse
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3565
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198
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146
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4
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3.8
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20
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30
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7.9
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Cadillac STS
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4030
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196
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146
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6
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3.6
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18
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27
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8.7
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Chevrolet Impala Chevrolet Malibu
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3710 3135
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200
188
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155
139
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6
4
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3.9
2.2
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19
24
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27
32
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8.2
6.8
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Chrysler 300 Dodge
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4105
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197
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133
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8
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5.7
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17
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25
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9.3
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Charger Dodge
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4170
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200
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131
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8
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5.7
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17
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25
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9.3
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Stratus Ford Crown
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3190
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191
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131
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4
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2.4
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22
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30
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7.4
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Vic
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4180
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212
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140
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8
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4.6
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17
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25
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9.3
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Ford Focus
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2760
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168
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137
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4
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2.0
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26
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32
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6.5
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Honda Accord
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3195
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190
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144
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4
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2.4
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24
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34
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6.6
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Hyundai Elantra
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2980
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177
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133
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4
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2.0
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24
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32
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6.7
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Infiniti M35
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4095
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193
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122
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6
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3.5
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18
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25
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9.0
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Jaguar XJ8
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3860
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200
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133
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8
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4.2
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18
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27
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8.6
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Kia Amanti
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4020
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196
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143
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6
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3.5
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17
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25
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9.3
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Kia Spectra
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2875
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176
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144
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4
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2.0
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25
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34
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6.5
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Lexus GS300
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3915
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190
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133
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6
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3.0
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22
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30
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7.4
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Lexus LS
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4205
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197
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134
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8
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4.3
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18
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25
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8.7
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Lincoln Town Car
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4415
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215
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143
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8
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4.6
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17
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25
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9.3
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Mazda 3
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3060
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177
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129
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4
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2.3
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26
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32
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6.5
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Mercedes-Benz E
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3745
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190
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128
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6
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3.2
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27
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37
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7.0
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Mercury Gr. Marq.
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4180
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212
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140
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8
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4.6
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17
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25
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9.3
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Nissan Altima
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3235
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192
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144
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4
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2.5
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23
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29
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7.1
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Pontiac G6
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3475
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189
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146
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6
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3.5
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22
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32
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7.2
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Saturn Ion
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2865
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185
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130
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4
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2.2
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24
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32
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6.7
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Toyota Avalon
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3600
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197
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139
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6
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3.5
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22
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31
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7.2
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Toyota Corolla VW
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2595
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178
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140
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4
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1.8
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30
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38
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5.5
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Passat
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3465
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188
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135
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4
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2.0
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22
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31
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7.3
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Volvo S80
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3630
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190
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136
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6
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2.9
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20
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27
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8.2
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