What is the probability of dot-compliant helmet use

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Reference no: EM131455103

Question: The National Occupant Protection Use Survey (NOPUS) was conducted to provide probability-based data on motorcycle helmet use in the United States. The survey was con-ducted by sending observers to randomly selected roadway sites where they collected data on motorcycle helmet use, including the number of motorcyclists wearing a Department of Transportation (DOT)-compliant helmet (National Highway Traffic Safety Administration website, January 7, 2010). Sample data consistent with the most recent NOPUS are shown below:

a. Use the sample data to compute an estimate of the probability that a motorcyclist wears a DOT-compliant helmet.

b. The probability that a motorcyclist wore a DOT-compliant helmet five years ago was .48. and last year this probability was .63. Would the National Highway Traffic Safety Administration be pleased with the most recent survey results shown above?

c. What is the probability of DOT-compliant helmet use by region of the country? What region has the highest probability of DOT-compliant helmet use?

Reference no: EM131455103

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