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In: Statistics and Probability

Use the data below, showing a summary of highway gas mileage for several observations, to decide...

Use the data below, showing a summary of highway gas mileage for several observations, to decide if the average highway gas mileage is the same for midsize cars, SUV’s, and pickup trucks.  Test the appropriate hypotheses at the α = 0.01 level. 
         n  Mean   Std. Dev. 
Midsize  31  25.8   2.56
SUV’s    31  22.68  3.67
Pickups  14  21.29  2.76

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orchestra answered 2 years ago
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