The National Highway Traffic Safety Administration (NHTSA) conducted a survey to learn about how drivers throughout the United States are using seat belts (Associated Press, August 25, 2003). Sample data consistent with the NHTSA survey are as follows: Question Drivers Using Seat belts: Region Yes No Northeast 148 52 Midwest 162 54 South 296 74 West 252 48 total 858 228 Question - Part a For the United States, what is the probability that a driver is using a seat belt? My answer is 0.79 My Question Assuming the total number of drivers in each region is the same, do you see any reason why the probability estimate in part (a) might be too high?
The National Highway Traffic Safety Administration (NHTSA) conducted a survey to learn about how drivers throughout the United States are using seat belts (Associated Press, August 25, 2003). Sample data consistent with the NHTSA survey are as follows:
Question Drivers Using Seat belts:
Region Yes No
Northeast 148 52
Midwest 162 54
South 296 74
West 252 48
total 858 228
Question - Part a For the United States, what is the probability that a driver is using a seat belt? My answer is 0.79
My Question
Assuming the total number of drivers in each region is the same, do you see any reason why the probability estimate in part (a) might be too high?
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