In exercise 6 use the listed sample data from car crash experiments conducted b the National Transportation Safety Administration. New cars were purchased and crashed into a fixed barrier at 35 mi/hr. and the listed measurements were recorded for the dummy in the driver's seat. The subcompact cars are the Ford Escort, Honda Civic, Hyundai Accent, Nissan Sentra and Saturn SLA. The compact cars are Chevrolet Cavalier, Dodge Neon, Mazda 626 DX, Pontiac Sunfire, and Subarn Legacy. The midsize cars are Chevrolet, Dodge Intrepid, Ford Mustang, Honda Accord, and Volvo S70. The full-size cars are Audi A8, Cadillac Deville, Ford Crown Victoria, Oldsmobile Aurora, and Pontiac Bonneville.
#6 pg 639
Chest Deceleration in a Car Crash: The chest deceleration data (g) are given below.
Use a 0.05 significance level to test null hypothesis that the different weight categories have the same mean. Do the data suggest that larger cars are safer?
(see chart in attached file)
This posting contains a question on comparing means for four types of cars.