Question: The U.S. Energy Information Administration releases figures in their publication, Monthly Energy Review, about the cost of various fuels and electricity. Shown here are the figures for four different items over a 12-year period. Use the data and stepwise regression to predict the cost of residential electricity from the cost of residential natural gas, residential fuel oil, and leaded regular gasoline.
|
Electricity
|
Natural Gas
|
Fuel Oil
|
Gasoline
|
|
234
|
129
|
021
|
0.39
|
|
331
|
1.71
|
031
|
0.57
|
|
4.64
|
298
|
0.44
|
0.86
|
|
536
|
3.68
|
0.61
|
1.19
|
|
62
|
429
|
0.76
|
1.31
|
|
6.86
|
5.17
|
0.68
|
1.22
|
|
7.18
|
6.06
|
0.65
|
1.16
|
|
7.54
|
6.12
|
0.69
|
1.13
|
|
7.79
|
6.12
|
0.61
|
1.12
|
|
7.41
|
5.83
|
034
|
0.86
|
|
7.41
|
534
|
0.42
|
0.9
|
|
7.49
|
4.49
|
033
|
0.9
|