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City Fuel Consumption: Finding the Best Multiple
Chapter 10, Problem 12BSC(choose chapter or problem)
Problem 12 BSC
City Fuel Consumption: Finding the Best Multiple Regression Equation.Refer to the accompanying table, which was obtained using the data from 21 cars listed in Data Set 14 in Appendix B. The response (y) variable is CITY (fuel consumption in mil gal). The predictor (x) variables are WT (weight in pounds), DISP (engine displacement in liters), and HWY (highway fuel consumption in milgal).
Predictor (x) Variables |
P-value |
R2 |
AdjustedR2 |
Regression Equation |
WT/DISP/HWY |
0.000 |
0.943 |
0.933 |
CITY = 6.86 - 0.00128 WT -0.257 DISP+ 0.652 HWY |
WT/DISP |
0.000 |
0.748 |
0.720 |
CITY = 38.0 - 0.00395 WT - 1.29 DISP |
WT/HWY |
0.000 |
0.942 |
0.935 |
CITY = 6.69 - 0.00159 WT + 0.670 HWY |
DISP/HWY |
0.000 |
0.935 |
0.928 |
CITY = 1.87 - 0.625 DISP + 0.706 HWY |
WT |
0.000 |
0.712 |
0.697 |
CITY = 41.8-0.00607 WT |
DISP |
0.000 |
0.659 |
0.641 |
CITY = 29.0-2.98 DISP |
HWY |
0.000 |
0.924 |
0.920 |
CITY = -3.15+ 0.819 HWY |
A Honda Civic weighs 2740 lb, it has an engine displacement of 1.8 L, and its highway fuel consumption is 36 mi/gal. What is the best predicted value of the city fuel consumption? Is that predicted value likely to be a good estimate? Is that predicted value likely to be very accurate?
Questions & Answers
QUESTION:
Problem 12 BSC
City Fuel Consumption: Finding the Best Multiple Regression Equation.Refer to the accompanying table, which was obtained using the data from 21 cars listed in Data Set 14 in Appendix B. The response (y) variable is CITY (fuel consumption in mil gal). The predictor (x) variables are WT (weight in pounds), DISP (engine displacement in liters), and HWY (highway fuel consumption in milgal).
Predictor (x) Variables |
P-value |
R2 |
AdjustedR2 |
Regression Equation |
WT/DISP/HWY |
0.000 |
0.943 |
0.933 |
CITY = 6.86 - 0.00128 WT -0.257 DISP+ 0.652 HWY |
WT/DISP |
0.000 |
0.748 |
0.720 |
CITY = 38.0 - 0.00395 WT - 1.29 DISP |
WT/HWY |
0.000 |
0.942 |
0.935 |
CITY = 6.69 - 0.00159 WT + 0.670 HWY |
DISP/HWY |
0.000 |
0.935 |
0.928 |
CITY = 1.87 - 0.625 DISP + 0.706 HWY |
WT |
0.000 |
0.712 |
0.697 |
CITY = 41.8-0.00607 WT |
DISP |
0.000 |
0.659 |
0.641 |
CITY = 29.0-2.98 DISP |
HWY |
0.000 |
0.924 |
0.920 |
CITY = -3.15+ 0.819 HWY |
A Honda Civic weighs 2740 lb, it has an engine displacement of 1.8 L, and its highway fuel consumption is 36 mi/gal. What is the best predicted value of the city fuel consumption? Is that predicted value likely to be a good estimate? Is that predicted value likely to be very accurate?
ANSWER:
Answer :
Step 1 of 1 :
Given the response (y) variable is CITY (fuel consumption in mil gal).
The predictor (x) variables are WT (weight in pounds), DISP (engine displacement in liters), and HWY (highway fuel consumption in mil gal).
The table is given below.
Predictor (x) Variables |
P-value |
|
Adjusted |
Regression |
WT/DISP/HWY |
0 |
0.943 |
0.933 |
CITY = 6.86 - 0.00128 WT -0.257 DISP+ |
WT/DISP |
0 |