Test the appropriate hypotheses

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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

Reference no: EM133035418

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