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bachelor in business administration
Polytechnic State University Sanluis
Jan-2006 - Nov-2010
CPA
Polytechnic State University
Jan-2012 - Nov-2016
Professor
Harvard Square Academy (HS2)
Mar-2012 - Present
Testing Effectiveness of Bicycle Helmets A study was conducted of 531 persons in- jured in bicycle crashes, and randomly selected sample results are summarized in the accompanying table. The TI-83 Plus 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 pre- vent facial injuries in a crash?
TI-83 Plus
|
|
Helmet Worn |
No Helmet |
|
Facial injuries received |
30 |
182 |
|
All injuries nonfacial |
83 |
236 |
Based on data from “A Case-Control Study of the Effectiveness of Bi- cycle Safety Helmets in Preventing Facial Injury,” by Thompson, Thompson, Rivara, and Wolf, American Journal of Public Health, Vol. 80, No. 12.
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