Final answer:
Vehicle transfer and odometer records must be kept for 5 years. An odometer measures distance traveled, and a speedometer measures speed, not velocity.
Step-by-step explanation:
Records of vehicle transfers and odometer statements must be retained for 5 years. An odometer measures the distance traveled by a vehicle, not displacement, as it records the total ground covered regardless of the direction. The car's speedometer, on the other hand, measures speed, which is the scalar quantity of how fast the vehicle is moving, rather than velocity, which requires a specified direction as well as magnitude. When considering the time people keep their newly purchased cars, the information provided suggests that this time is normally distributed with a mean of seven years and a standard deviation of two years. This statistical data is useful for analyzing consumer behavior and vehicle lifespan trends.