[See Solution] A case-control (or retrospective) study was conducted to investigate a relationship between the colors of helmets worn by motorcycle drivers
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 table below. Test the claim that injuries are independent of helmet color. Should motorcycle drivers choose helmet with particular color?
| Black | White | Yellow - Orange | Red | Blue | |
| Controls | 491 | 377 | 31 | 170 | 55 |
| Cases | 213 | 112 | 8 | 70 | 26 |
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