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Get Full Access to Elementary Statistics - 12 Edition - Chapter 11.3 - Problem 4re
Get Full Access to Elementary Statistics - 12 Edition - Chapter 11.3 - Problem 4re

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# Bicycle Helmets A study was conducted of 531 persons

ISBN: 9780321836960 18

## Solution for problem 4RE Chapter 11.3

Elementary Statistics | 12th Edition

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Elementary Statistics | 12th Edition

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Problem 4RE

Bicycle Helmets? A study was conducted of 531 persons injured in bicycle crashes, and randomly selected sample results are summarized in the table shown on the next page (based on results from “A Case-Control Study of the Effectiveness of Bicycle Safety Helmets in Preventing Facial Injury,” by Thompson et al., ?American Journal of Public Health,? Vol. 80, No. 12). The TI-83/84 Plus calculator results also are shown. At the 0.05 significance level, test the claim that wearing a helmet has no effect on whether facial injuries are received. Based on these results, does a helmet seem to be effective in helping to prevent facial injuries in a crash? H e N l o m H e e t l W m o e r t n Facial 1 Injuries 3 8 Receive 0 2 d All 2 Injuries 8 3 Nonfaci 3 6 al

Step-by-Step Solution:
Step 1 of 3

Solution 4RE Step1: From the above given problem we have Bicycle Helmets A study was conducted of 531 persons injured in bicycle crashes, and randomly selected sample results are summarized in the table shown on the next page Helmet worn No helmet Facial injuries received 30 182 All injuries non facial 83 236 Step2: Our aim is to test the claim that wearing a helmet has no effect on whether facial injuries are received. Based on these results, does a helmet seem to be effective in helping to prevent facial injuries in a crash. Consider the hypothesis, H 0 wearing a helmet has no effect on receiving facial injuries. H 1 wearing a helmet has effect on receiving facial injuries. Step3: goodness of fit can be calculated by using TI-83/84 Plus calculator and it is given by Conclusion: From the output result we have = 10.7080789 and p value p = 0.001066 with 1 degrees of freedom, comparing p value with level of significance of p value(p = 0.001) is less than level of significance = 0.05. Hence, we reject null hypothesis that indicates that wearing a helmet has effect on receiving facial injuries.It also appears that wearing a helmet seems to be effective in preventing facial injuries in crash.

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Step 3 of 3

##### ISBN: 9780321836960

This textbook survival guide was created for the textbook: Elementary Statistics, edition: 12. The full step-by-step solution to problem: 4RE from chapter: 11.3 was answered by , our top Statistics solution expert on 03/15/17, 10:30PM. Elementary Statistics was written by and is associated to the ISBN: 9780321836960. This full solution covers the following key subjects: facial, injuries, results, bicycle, helmets. This expansive textbook survival guide covers 121 chapters, and 3629 solutions. Since the solution to 4RE from 11.3 chapter was answered, more than 379 students have viewed the full step-by-step answer. The answer to “Bicycle Helmets? A study was conducted of 531 persons injured in bicycle crashes, and randomly selected sample results are summarized in the table shown on the next page (based on results from “A Case-Control Study of the Effectiveness of Bicycle Safety Helmets in Preventing Facial Injury,” by Thompson et al., ?American Journal of Public Health,? Vol. 80, No. 12). The TI-83/84 Plus calculator results also are shown. At the 0.05 significance level, test the claim that wearing a helmet has no effect on whether facial injuries are received. Based on these results, does a helmet seem to be effective in helping to prevent facial injuries in a crash? H e N l o m H e e t l W m o e r t n Facial 1 Injuries 3 8 Receive 0 2 d All 2 Injuries 8 3 Nonfaci 3 6 al” is broken down into a number of easy to follow steps, and 144 words.

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