The chest deceleration data (in g's) from the tests described in Exercise 13 are given below. Use a 0.05 significance level to test the null hypothesis that the different weight categories have the same mean. Do the data suggest that larger cars are safer?

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Subcompac 55 4759 49 42 Compact: 57 57 46 54 51 Midsize: 45 53 49 51 46 Full-size: 4445 39 58 44