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, testthe claim that injuries are independent of helmet color.Color of HelmetBlackWhiteYellowRedBlue3593516095Controls (not injured)Cases (injured orkilled)5012121076645Click here to view the chi-square distribution table.Identify the null and alternative hypotheses. Choose the correct answer below.O A. Ho: Injuries and helmet color are dependentH,: Injuries and helmet color are independentO B. Ho: Injuries and helmet color are independentH1: Injuries and helmet color are dependentO C. Ho: Whether a crash occurs and helmet color are independentH,: Whether a crash occurs and helmet color are dependentO D. H: Whether a crash occurs and helmet color are dependentH,: Whether a crash occurs and helmet color are independent Compute the test statistic.12.547(Round to three decimal places as needed.)Find the critical value(s).13.277(Round to three decimal places as needed. Use a comma to separate answers as needed.)What is the conclusion based on the hypothesis test?RejectHo. Thereissufficient evidence to warrant rejection of the claim that injuries are independent of helmet color.

We will conduct Chi-square test of independence to test the claim that injuries are independent of…

Compute the test statistic. 12.547 (Round to three decimal places as needed.) Find the critical value(s). 13.277 (Round to three decimal places as needed. Use a comma to se What is the conclusion based on the hypothesis test?

Compute the test statistic. 12.547 (Round to three decimal places as needed.) Find the critical value(s). 13.277 (Round to three decimal places as needed. Use a comma to se What is the conclusion based on the hypothesis test?

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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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 0.01 significance level, test
the claim that injuries are independent of helmet color.
Color of Helmet
Black
White
Yellow
Red
Blue
359
35
160
95
Controls (not injured)
Cases (injured or
killed)
501
212
107
66
45
Click here to view the chi-square distribution table.
Identify the null and alternative hypotheses. Choose the correct answer below.
O A. Ho: Injuries and helmet color are dependent
H,: Injuries and helmet color are independent
O B. Ho: Injuries and helmet color are independent
H1: Injuries and helmet color are dependent
O C. Ho: Whether a crash occurs and helmet color are independent
H,: Whether a crash occurs and helmet color are dependent
O D. H: Whether a crash occurs and helmet color are dependent
H,: Whether a crash occurs and helmet color are independent

Compute the test statistic.
12.547
(Round to three decimal places as needed.)
Find the critical value(s).
13.277
(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
Ho. There
is
sufficient evidence to warrant rejection of the claim that injuries are independent of helmet color.

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