Gas mileage, in miles per gallon, was measured for five Ford Explorer SUVs. Following are the results,
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Gas mileage, in miles per gallon, was measured for five Ford Explorer SUVs. Following are the results, along with a dotplot of the data.
a. Is it reasonable to assume that the conditions for constructing a confidence interval for the mean gas mileage are satisfied?
Explain.
b. If appropriate, construct a 95% confidence interval for the mean gas mileage.
c. The EPA gas mileage rating for the 2012 Ford Explorer is 19 miles per gallon. If appropriate, explain whether the rated mileage may be equal to the mean mileage, based on the confidence interval.
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