Question: Does the Weight of a Car affect Leg Injuries in a Crash? Data were obtained from car crash experiments conducted by the national Transportation Safety Administration. New cars were purchased and crashed into a fixed barrier at 35 mi/h, and measurements were recorded for the dummy in the driver seat. Use the sample data listed below to test for differences in left femur load measurements (in lb) among the four weight categories. Is there sufficient evidence to conclude that the leg injury measurements for the four categories are not all the same? Do de data suggest that heavier cars are safer in a crash?