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. View the chi-square distribution table. Color of Helmet Black White Yellow Red Blue Controls (not injured) 479 372 27 151 77 Cases (injured or killed) 202 116 7 65 38 Compute the test statistic. ___________ (Round to three decimal places as needed.) Find the critical value(s). _____________ (Round to three decimal places as needed. Use a comma to separate answers as needed.)
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. View the chi-square distribution table. Color of Helmet Black White Yellow Red Blue Controls (not injured) 479 372 27 151 77 Cases (injured or killed) 202 116 7 65 38 Compute the test statistic. ___________ (Round to three decimal places as needed.) Find the critical value(s). _____________ (Round to three decimal places as needed. Use a comma to separate answers as needed.)
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Questions #5
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.
significance level, test the claim that injuries are independent of helmet color.
View the chi-square distribution table.
|
|
|
Color of Helmet
|
|
|
||||
|---|---|---|---|---|---|---|---|---|
|
|
|
Black
|
White
|
Yellow
|
Red
|
Blue
|
|
|
|
Controls (not injured)
|
|
479
|
372
|
27
|
151
|
77
|
|
|
|
Cases (injured or killed)
|
|
202
|
116
|
7
|
65
|
38
|
|
|
Compute the test statistic.
___________
(Round to three decimal places as needed.)
Find the critical value(s).
_____________
(Round to three decimal places as needed. Use a comma to separate answers as needed.)
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