A case-control (or retrospective) study was conducted to investigate a relations
ID: 3059293 • Letter: A
Question
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. Resus 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 ntrols (not injured) Cases (injured or killed) Black White Yellow Red 152 64 483 199 369 112 31 38 Identify the nul and alternative hypotheses. Choose the correct answer below. A. O B. O C. ( D. HO: Injuries and helmet color are independent H1: Injuries and helmet color are dependent Hg: Whether a crash occurs and helmet color are dependent H1: Whether a crash occurs and helmet color are independent Hg: Whether a crash occurs and helmet color are independent H1: Whether a crash occurs and helmet color are dependent HO: Injuries and helmet color are dependent H,: Injuries and helmet color are independent Compute the test statistic. (Round to three decimal places as needed.) Find the critical value(s). (Round to three decimal places as needed. Use a comma to separate answers as needed.) What is the conclusion based on the hypothesis test? | Ho. There sufficient evidence to warrant rejection of the claim that injuries are independent of helmet colorExplanation / Answer
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. Resus 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 ntrols (not injured) Cases (injured or killed) Black White Yellow Red 152 64 483 199 369 112 31 38 Identify the nul and alternative hypotheses. Choose the correct answer below. A. O B. O C. ( D. HO: Injuries and helmet color are independent H1: Injuries and helmet color are dependent Hg: Whether a crash occurs and helmet color are dependent H1: Whether a crash occurs and helmet color are independent Hg: Whether a crash occurs and helmet color are independent H1: Whether a crash occurs and helmet color are dependent HO: Injuries and helmet color are dependent H,: Injuries and helmet color are independent Compute the test statistic. (Round to three decimal places as needed.) Find the critical value(s). (Round to three decimal places as needed. Use a comma to separate answers as needed.) What is the conclusion based on the hypothesis test? | Ho. There sufficient evidence to warrant rejection of the claim that injuries are independent of helmet color
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