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 White Black 507 Yellow Red Blue Controls (not injured) Cases (injured or killed) 371 29 158 66 78 211 113 7 38 Click here to view the chi-square distribution table Identify the null and alternative hypotheses. Choose the correct answer below. O A. Hg: Injuries and helmet color are independent H;: Injuries and helmet color are dependent O B. 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 dependent H.: Injuries and helmet color are independent O D. Ho: Whether a crash occurs and helmet color are independent H;: Whether a crash occurs and helmet color are dependent 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? V Họ. There V sufficient evidence to warrant rejection of the claim that injuries are independent of helmet color.

12th Edition

ISBN:9781305652231

Author:R. David Gustafson, Jeff Hughes

Publisher:R. David Gustafson, Jeff Hughes

Chapter8: Sequences, Series, And Probability

Section8.7: Probability

Problem 58E: What is meant by the sample space of an experiment?