Control or retrospective study was conducted to investigate

Last updated: 7/7/2023

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 05 significance level test the claim that injuries are independent of helmet color Color of Helmet Black White Yellow 491 352 33 203 106 8 Controls not Injured Cases Injured or killed Click here to view the chi square distribution table Identify the null and alternative hypotheses Choose the correct answer below OA Ho Injuries and helmet color are independent H Injuries 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 C Ho Injuries and helmet color are dependent H Injuries and helmet color are independent Red 160 68 Compute the test statistic OD Ho Whether a crash occurs and helmet color are independent H Whether a crash occurs and helmet color are dependent Round to three decimal places as needed Find the critical value s Blue 75 36 Round to three decimal places as needed Use a comma to separate answers as needed What is the conclusion based on the hypothesis test CE T