Using a 0.05 significance level, test the claim that injuries are independent of helmet color.
Using a 0.05 significance level, test the claim that injuries are independent of helmet color.
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
Related questions
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 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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