A case- control (or retrospective) study was conducted to investigate a relation

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. Results are given in the accompanying table. Using a 0.01 significance level, test the claim that injuries are independent of helmet color. Identify the null and alternative hypotheses. Choose the correct answer below. A. H_0: Injuries and helmet color are dependent H_1: Injuries and helmet color are independent B. H_0: Whether a crash occurs and helmet color are independent H_1: Whether a crash occurs and helmet color are dependent C. H_0: Injuries and helmet color are independent H_1: Injuries and helmet color are dependent D. H_0: Whether a crash occurs and helmet color are dependent H_1: Whether a crash occurs and helmet color are independent

Explanation / Answer

Answer:

H0 : Whether a crash occurs and helmet color are dependent

H1: Whether a crash occurs and helmet color are independent.

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