In a car crashexperiment, cars are classified into one of fourgroups: subcompact,compact, midsize, andfull-size. There are five different cars in each group. Head injury data(in hic, which are standard head injury conditionunits) for the dummies in thedriver's seat are listed in the accompanying table. Use a 0.05 significance level. Test the null hypothesis that the different weight categories have the same mean. Do the sample data suggest that larger cars aresafer?

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Click the icon to view the table of the head injury data for the dummies in thedriver's seat.

State the null and alternative hypotheses.

A.

H0: 1=2=3=4

Ha: 1234

B.

H0: 1=2=3=4

Ha: At least one of the population means is different from the others.

Your answer is correct.

C.

H0: At least one of the population means is different from the others.

Ha: 1=2=3=4

D.

H0: 1=2=3=4=5

Ha: At least one of the population means is different from the others.

Use technology to calculate the test statistic F.

F=

nothing

(Round to two decimal places asneeded.)