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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

 

Statistics and Probability, Statistics

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

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