Injuries and motorcycle helmet colour a case-control or, Ask an Expert

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Chi-square test for independence of attributes.

Injuries and Motorcycle Helmet Colour A case-control (or retrospective) study was conducted to investigate a relationship between the colours 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 colour. Should motorcycle drivers choose helmets with a particular colour? If so, which colour appear bets?

Colour of Helmet
	White	Black	Yellow/Orange	Red	Blue
Controls(Not Injured)	337	419	31	170	55
Cases(Injured or Killed)	112	213	8	70	26

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Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M922735

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