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ANOVA

Listed below are measured amounts of greenhouse gas emissions from cars in three different categories. The measurements are in tons per year, expressed as CO2 equivalents. Use a 0.05 significance level to test the claim that the different care categories have the same mean amount of greenhouse gas emission. Based on the results, does the number of cylinders appear to affect the amount of greenhouse gas emissions? Use analysis of variance for the indicated test.

Four Cylinder 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

Six Cylinder 8.7 7.7 7.7 8.7 8.2 9.0 9.3 7.4 7.0 7.2 7.2 8.2

Eight Cylinder 9.3 9.3 9.3 8.6 8.7 9.3 9.3

Solution Preview

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You are testing if the three groups of cars have statistically significantly greenhouse gas emissions.

Null hypothesis: each of the three groups of ...

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