due to the most recent gasoline crisis, the federal government has been funding
ID: 3133504 • Letter: D
Question
due to the most recent gasoline crisis, the federal government has been funding researches to investigate and develop alternative sources of fuel. a new product, methanol, is currently being tested in California. it cost much less than regular gasoline and, if judged successful, will require fewer natural oil resources than gasoline does. a test was run on five cars of different sizes to compare the mileage per gallon obtained using methanol with the mileage per gallon obtained with a standard brand of gasoline. the following results were obtained: Car 1 Meth:14.0 Reg gas: 12.3 Car 2 Meth:20.0 Reg gas: 17.8 Car 3 Meth: 21.4 Reg gas: 20.9 Car 4 Meth: 27.1 Reg Gas: 25.7 Car 5 Meth: 35.6 Reg Gas: 33.0......AT a 0.01 significance level, can we conclude that the mean mileage per gallon of methanol is significantly greater than the mean mileage per gallon of regular gasoline?
Explanation / Answer
Mean mileage per gallon using methanol = (14.0+20.0+21.4+27.1+35.6)/5 = 23.62
Mean mileage per gallon with standard gasoline = (12.3+17.8+20.9+25.6+33.0) = 21.94
At significance level 0.01 , it is clear that mileage using methanol is higher than mileage with standard gasoline.
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