Below are results of braking tests of the Ford Explorer on glare ice, packed snow, and split traction (one set of wheels on ice, the other on dry pavement), using three braking methods. Research question: At α = .01, is braking method related to stopping distance?

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Stopping Distance from 40 mph to Zero Pumping Locked ABS Road Condition Glare Ice Split Traction Packed Snow 441 223 149 455 148 146 460 183 167