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 are given in the accompanying table. Using a 0.01 significance level, test the claim that injuries are independent of helmet color. Color of Helmet Black White Yellow Red Blue Controls (not injured) 490 355 35 160 97 Cases (injured or 209 111 9 68 47 killed)Chi-square distribution table Degrees of Area to the Right of the Critical Value Freedom 0.995 0.99 0.975 0.95 0.90 0.1 0 d 2 3 4 5 6 7 8 9 A O