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 0.01 significance level, test the claim that injuries are independent of helmet color.
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 0.01 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
Publisher:Carter
Chapter4: Equations Of Linear Functions
Section4.5: Correlation And Causation
Problem 11PPS
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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
0.01
significance level, test the claim that injuries are independent of helmet color.
|
|
Color of Helmet
|
|
|
|
||||
---|---|---|---|---|---|---|---|---|---|
|
|
Black
|
White
|
|
Yellow
|
Red
|
Blue
|
|
|
Controls (not injured)
|
|
494
|
343
|
|
27
|
168
|
99
|
|
|
Cases (injured or killed)
|
|
210
|
107
|
|
6 | 71 | 47 |
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