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Statistics

Listed below are measured MPGs from three different categories of vehicles.
Vehicle Miles per Gallon
Vehicle Category
#1 9.3 9.3 9.3 8.6 8.7 9.3
#2 8.7 7.7 7.7 8.7 8.2 9.0 7.4 7.0
#3 7.2 7.9 6.8 7.4 6.5 6.6 6.7 6.5 6.5 7.1 6.7 5.5 7.3
x bar subscript i s squared subscript i
9.91, 8.03, 6.82 .10, .60, .34

Also given that x bar = 7.99

What is the test statistic?
Use a 5% significance level (95% confidence level) to test the claim that the different vehicle categories have the same mean MPG.

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