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# Point) retrospective study was conducted to investigate relationship between the colors of helmets worn by motorcycle drivers and whether they are injured or killed...

## Question

###### Point) retrospective study was conducted to investigate relationship between the colors of helmets worn by motorcycle drivers and whether they are injured or killed in crash: Results are given in the table below (based on data from Motorcycle Rider Conspicuity and Crash Related Injury: Case- Control Study;" by Wells et al., BMJ USA Vol 4). All of the following questions should be rounded to the nearest percent:Colour of Helmet for Motorcycle Riders involved in CrashNot Injured Injured/Kille

point) retrospective study was conducted to investigate relationship between the colors of helmets worn by motorcycle drivers and whether they are injured or killed in crash: Results are given in the table below (based on data from Motorcycle Rider Conspicuity and Crash Related Injury: Case- Control Study;" by Wells et al., BMJ USA Vol 4). All of the following questions should be rounded to the nearest percent: Colour of Helmet for Motorcycle Riders involved in Crash Not Injured Injured/Killed 491 213 377 112 Black White Yellow/Orange (iv) Red 170 (v) Blue Total 1124 429 What percent of the Motorcycle riders recorded for this study wore black helmets? 0.4533 What percent of the Motorcycle riders recorded for this study were injured or killed? 0.2762 What percent of the white helmet-wearing Motorcycle riders were injured or killed? 0.261 What percent of the red helmet-wearing Motorcycle riders were injured or killed? 632 What percent of the yellowlorange helmet-wearing Motorcycle riders were injured or killed? 0.0186 What percent of the blue helmet-wearing Motorcycle riders were injured or killed? 0.0606 Do the colour of motorcycle helmet worn and injury/death chance appear to be independent?

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