Listed below are head injury data from crash test dummies. These measurements are in hic, which denotes a standard head injury criterion. Use a 0.05 significance level to test the null hypothesis that the different car categories have the same mean. Do these data suggest that larger cars are safer? . small cars 290 406 371 544 374 501 376 499 479 475 . . medium cars 245 502 474 505 393 264 368 510 296 349 . . large cars 342 216 335 698 216 169 608 432 510 332*