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. Compute the test statistic. find the critical value χ2

Q: A​ case-control (or​ retrospective) study was conducted to investigate a relationship between the…

A: Null hypothesis: Alternative hypothesis:

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Q: Using a 0.05 significance​ level, test the claim that injuries are independent of helmet color.

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