Question

Are younger drivers more likely to have accidents in their driveways? Traffic engineers tabulated types of car accidents by drivers of various ages. Out of a total of 82,486 accidents involving drivers aged 15 – 24 years, 4243 of them, 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. Construct a 90% confidence interval and use the interval to determine whether accidents involving drivers aged 15–24 are more likely to occur in driveways than accidents involving drivers aged 25–64?

Answer 1

As the lower limit of the C.I is greater than zero, it is concluded that accidents involving drivers aged 15–24 are more likely to occur in driveways than accidents involving drivers aged 25–64.