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

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
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Chapter4: Equations Of Linear Functions
Section4.5: Correlation And Causation
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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
0.05
significance​ level, test the claim that injuries are independent of helmet color.
 
 
 
Color of Helmet
 
 
 
 
Black
White
Yellow
Red
Blue
 
 
Controls​ (not injured)
 
479
346
32
164
88
 
 
Cases​ (injured or​ killed)
 
201
99
9
67
43
 
 
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