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: Is the mean stopping distance affected by braking method and/or by Braking surface type?

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Stopping Distance from 40 mph to 0 mph Method Ice Split Traction Packed Snow Pumping Locked ABS 441 455 460 223 148 183 149 146 167