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...

A. Determine test statistic

B. Determine critical value with k-1 degree of freedom then use the chi square to find critical value.

C. Reject H0 or Fail H0.

Extracted text: 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) Cases (injured or killed) 482 341 25 165 85 205 103 68 40 Click here to view the chi-square distribution table. ..... Identify the null and alternative hypotheses. Choose the correct answer below. O A. Ho: Injuries and helmet color are dependent H,: Injuries and helmet color are independent B. Ho: Injuries and helmet color are independent H,: Injuries and helmet color are dependent C. Ho: Whether a crash occurs and helmet color are independent H,: Whether a crash occurs and helmet color are dependent Ho: Whether a crash occurs and helmet color are dependent H1: Whether a crash occurs and helmet color are independent Compute the test statistic. (Round to three decimal places as needed.)