A quаlity engineer wоnders whether there аre significаnt differences in autоmatic transmissiоn failure modes between manufacturing plants. Data was collected on the failure modes for one month of failures; 109 failures were observed: Manufacturing plants were: Plant A, Plant B, and Plant C The failure modes observed were: Clutch assembly, Hydraulic system, Torque converter, and Control valve assembly Which statistical method should be used to test whether failure mode is independent of manufacturing plant?