A case control or retrospective study was conducted to

Last updated: 11/27/2023

A case control or retrospective study was conducted to investigate a relationship between the colors of helmets worn by motorcycle drivers and whether they are injured or killed in a crash Results given in the accompanying table Using a 0 05 significance level test the claim that injuries are independent of helmet color Color of Helmet Yellow 27 6 Black White 484 346 204 104 Controls not injured Cases injured or killed Click here to view the chi square distribution table Red 158 65 Identify the null and alternative hypotheses Choose the correct answer below OA Ho Whether a crash occurs and helmet color are independent H Whether a crash occurs and helmet color are dependent OB Ho Whether a crash occurs and helmet color are dependent H Whether a crash occurs and helmet color are independent OC Ho Injuries and helmet color are independent H Injuries and helmet color are dependent O D Ho Injuries and helmet color are dependent H Injuries and helmet color are independent Blue 85 40 Chi square distribution table Degrees of Freedom 1 2 3 4 5 6 7 8 9 0 995 0 010 0 072 0 207 0 412 0 676 0 989 1 344 1 735 0 99 Area to the Right of the Critical Value 0 975 0 001 0 020 0 051 0 115 0 216 0 297 0 484 0 554 0 831 0 872 1 237 1 239 1 690 1 646 2 180 2 088 2 700 0 95 0 90 0 004 0 016 0 103 0 211 0 352 0 584 0 711 1 064 1 145 1 610 1 635 2 204 2 167 2 833 2 733 3 490 3 336 4100 0 05 3 841 5 991 0 01 0 10 2 706 0 025 5 024 6 635 4 605 7 378 9 210 6 251 7 815 9 348 11 345 7 779 9 488 11 143 13 277 12 833 15 086 16 812 9 236 11 071 10 645 12 592 14 449 14 067 16 013 18 475 15 507 17 535 20 090 12 017 13 362 0 005 7 879 10 597 12 838 14 860 16 750 18 548 20 278 21 955