All cars can be classified into one of fourgroups: thesubcompact, thecompact, themidsize, and thefull-size. There are five cars in each group.
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All cars can be classified into one of four​ groups: the​ subcompact, the​ compact, the​ midsize, and

the​ full-size. There are five cars in each group. Head injury data​ (in hic) for the dummies in the​ driver's seat are listed below. Use a 0.05 significance level. Find the​ P-value to test the null hypothesis that the different weight categories have the same mean. Do the sample data suggest that larger cars are​ safer?


head injury data for the dummies in the​ driver's seat.


​Subcompact: 681 428 917 898 520

​Compact: 643 655 442 514 525

​Midsize: 469 627 525 454 259

​Full-size: 384 656 502 687 360




Find the​ P-value.

The​ P-value is ___?(Round to three decimal places as​ needed.)



Do the sample data suggest that larger cars are​ safer?

A.

There is not sufficient evidence to reject the alternative hypothesis. It can be concluded that larger cars are safer.

B.

There is sufficient evidence to reject the null hypothesis. It can not beconclude that larger cars are safer.

C.

There is not sufficient evidence to reject the null hypothesis. It cannot be concluded that larger cars are safer.

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