In: Statistics and Probability
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?
Subcompact Compact Midsize
Full-size
681 643 469 384
528 755 727 656
917 442 525 602
898 614 454 687
420 525 259 360
------------------------------------------------------------------------------------------------------------------------------------------------------