# MPGavg A weighted average of miles per gallon, 60% highway and 40% city . MPGcity The estimated miles per gallon for city driving MPGhwy The...

** The U.S. government has been interested in pushing auto manufacturers to increase the MPG of their fleet.**

**Based on the regression results, what is the best answer concerning average MPG for 4 cylinder SUVs.**

- 4 cylinder SUVs have statistically higher average MPG when compared to 8 cylinder SUVs.
- The number of cylinders does not help explain average MPG.
- 6 cylinder SUVs do not have statistically higher average MPG when compared to 8 cylinder SUVs.
- 4 cylinder SUVs have statistically higher average MPG when compared to 6 cylinder SUVs.

. MPGavgA weighted average of miles per gallon, 60% highway and 40% city. MPGcityThe estimated miles per gallon for city drivingMPGhwyThe estimated miles per gallon for city drivingEng SizeThe size of the engine in litersCyl_4DumA dummy variable coded as one if the engine is 4 cylinders, zero for 6 or 8 cylinder SUVsCyl_6DumA dummy variable coded as one if the engine is 6 cylinders, zero for 4 or 8 cylinder SUVs. Cyl_8DumA dummy variable coded as one if the engine is 8 cylinders, zero for 4 or 6 cylinder SUVsThe following is the dummy variable regression results of MPGavg on Cyl_4Dum and Cyl_6Dum.Summary of FitRSquare0.7507RSquare Adj0.7456Root Mean SquareError1.7024Mean of Response21.2300Observations (orSum Wgts)100Analysis of VarianceSourceDFSum ofMeanSquaresSquareF RatioModel2846.5858423.293 146.0543Error97281.12422.898 Prob > F<.0001C. Total991127.7100Parameter EstimatesTermEstimateStd Errort Ratio Prob>/t|Intercept 16.95450.36346.7126<.0001Cyl_4Dum 7.24550.442916.36<.0001Cyl_6Dum 3.07580.46866.5641<.0001

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