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) 472 352 30 163 70 Cases (injured or killed) 201 106 8 67 34 Click here to view the chi-square distribution table. LOADING... Identify the null and alternative hypotheses. Choose the correct answer below. A. Upper H 0 : Whether a crash occurs and helmet color are independent Upper H 1 : Whether a crash occurs and helmet color are dependent B. Upper H 0 : Whether a crash occurs and helmet color are dependent Upper H 1 : Whether a crash occurs and helmet color are independent C. Upper H 0 : Injuries and helmet color are independent Upper H 1 : Injuries and helmet color are dependent D. Upper H 0 : Injuries and helmet color are dependent Upper H 1 : Injuries and helmet color are independent Compute the test statistic. enter your response here (Round to three decimal places as needed.) Find the critical value(s). enter your response here (Round to three decimal places as needed. Use a comma to separate answers as needed.) What is the conclusion based on the hypothesis test? ▼ Reject Fail to reject Upper H 0 . There ▼ is not is sufficient evidence to warrant rejection of 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 0.05 significance level, test the claim that injuries are independent of helmet color. Color of Helmet Black White Yellow Red Blue Controls (not injured) 472 352 30 163 70 Cases (injured or killed) 201 106 8 67 34 Click here to view the chi-square distribution table. LOADING... Identify the null and alternative hypotheses. Choose the correct answer below. A. Upper H 0 : Whether a crash occurs and helmet color are independent Upper H 1 : Whether a crash occurs and helmet color are dependent B. Upper H 0 : Whether a crash occurs and helmet color are dependent Upper H 1 : Whether a crash occurs and helmet color are independent C. Upper H 0 : Injuries and helmet color are independent Upper H 1 : Injuries and helmet color are dependent D. Upper H 0 : Injuries and helmet color are dependent Upper H 1 : Injuries and helmet color are independent Compute the test statistic. enter your response here (Round to three decimal places as needed.) Find the critical value(s). enter your response here (Round to three decimal places as needed. Use a comma to separate answers as needed.) What is the conclusion based on the hypothesis test? ▼ Reject Fail to reject Upper H 0 . There ▼ is not is sufficient evidence to warrant rejection of 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
|
|
|
Color of Helmet
|
|
|
||||
|---|---|---|---|---|---|---|---|---|
|
|
|
Black
|
White
|
Yellow
|
Red
|
Blue
|
|
|
|
Controls (not injured)
|
|
472
|
352
30
163
70
|
|
|
|
|
Cases (injured or killed)
|
|
201
|
|---|
106
8
67
34
|
|
|
Click here to view the chi-square distribution table.
LOADING...
Identify the null and alternative hypotheses. Choose the correct answer below.
A.
Upper H 0
:
Whether a crash occurs and helmet color are independentUpper H 1
:
Whether a crash occurs and helmet color are dependentB.
Upper H 0
:
Whether a crash occurs and helmet color are dependentUpper H 1
:
Whether a crash occurs and helmet color are independentC.
Upper H 0
:
Injuries and helmet color are independentUpper H 1
:
Injuries and helmet color are dependentD.
Upper H 0
:
Injuries and helmet color are dependentUpper H 1
:
Injuries and helmet color are independentCompute the test statistic.
enter your response here
(Round to three decimal places as needed.)
Find the critical value(s).
enter your response here
(Round to three decimal places as needed. Use a comma to separate answers as needed.)
What is the conclusion based on the hypothesis test?
▼
Reject
Fail to reject
Upper H 0
.
There
▼
is not
is
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