Newer, and later model cars are safer according to the NHTSA. Badly done statistic?

The study was enough to be the basis for several articles on car websites, and they quoted the actual numbers comparing the oldest and newest cars in the study.

They didn’t consider vehicle weight when they mentioned Delta-V, seat belts, age, and sex as possible things to consider for a future study. This leads people to think they should get rid of their full size car like a 2002 Crown Victoria and buy a new compact like a Toyota Yaris to be safe.