The article "Using Conditional Probability to Find Driver Age Effect in Crashes" (M. Abdel-Aty, C. Chen, and A. Radwan, Journal of Transportation Engineering, 1999:502-507) presents a tabulation of types of car crashes by the age of the driver over a three-year period in Florida. Out of a total of 82,486 accidents involving drivers aged 15-24 years, 4243, or 5.1%, occurred in a driveway. Out of a total of 219,170 accidents involving drivers aged 25-64 years, 10,701 of them, or 4.9%, occurred in a driveway.
a. Can you conclude that accidents involving drivers aged 15-24 are more likely to occur in driveways than accidents involving drivers aged 25-64?
b. Someone suggests that since accidents involving younger drivers are more likely to occur in drive- ways, young drivers should be required to take a special course in driveway driving. Is this justified by the data? Explain.