XrA14-13 Does driving an ABS-equipped car change the behavior of drivers? To help answer this question, the following experiment was undertaken. A random sample of 200 drivers who currently operate cars without ABS was selected.

Each person was given an identical car to drive for 1 year. Half the sample were given cars that had ABS, and the other half were given cars with standard-

equipment brakes. Computers on the cars recorded the average speed (in miles per hour)

during the year. Can we infer that operating an ABS-equipped car changes the behavior of the driver?