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Gas mileage, in miles per gallon, was measured for five 2012 Ford Explorer SUVs. The five...

Gas mileage, in miles per gallon, was measured for five 2012 Ford Explorer SUVs. The five results are as follows: 20.4 19.6 17.1 17.9. 18.7

a. Compute the sample mean.

b. Compute the sample variance and standard deviation.

c. Construct a 95% confidence interval for the average gas mileage in miles per gallon.

Math   Statistics-And-Probability   
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