Question

# 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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