Data from Consumer Reports New Car Buying Guide 2003-2004 of 43 vehicles (partial data shown below) was used to develop a multiple linear regression model to study fuel economy.City = EPA miles per in gallon city driving, Length = vehicle length (inches), Width = vehicle width (inches), Weight = weight (pounds), Japan = 1 if car maker is Japanese, 0 otherwise.The regression output is shown below the partial data.

Obs Vehicle City Length Width Weight Japan 1 Acura CL 20 192 69 3450 Accura TSX 23 183 59 3320 BMW 3-Series 19 176 69 3390 060 0 - - Buick Century 20 195 73 3350 Buick Rendezvous 18 187 74 4230 Cadillac Seville 18 201 75 4050 SUMMARY OUTPUT Regression Statistics Multiple R 0.838297 R Square 0.702743 Adjusted R Square 0.671452 Standard Error 2.505461 Observations 43 ANOVA of SS MS F Significance F Regression 4 563.9264257 140.9816 22 45883 0.00000 Residual 38 238.5386906 6.277334 Total 42 802.4651163 Coefficients Standard Error t Stat P.value Lower 95% Upper 95% Intercept 43.9932 8.4767 5.1899 0.0000 26.8330 61. 1534 Length -0.0039 0.0445 -0.0870 0.9311 -0.0939 0.0862 Width -0.1064 0. 1395 -0.7632 0.4501 -0.3888 0.1759 Weight -0.0041 0.0008 4.9546 0.0000 -0.0058 -0.0024 Japan -1.3228 0.8146 -1.6239 0. 1127 -2.9718 0.3262