2. A manufacturing plant for recreational vehicles receives shipments from three different spol parts vendors. There has been a defect issue with some of the electrical wiring in the recreational vehicles manufactured at the plant. The plant manager wonders if all of the vendors might be contributing equally to the defect issue. The plant manager reviews a sample of quality assurance inspections from the last six months. The data are shown in the table below. Purrfect Parts Co. |Made-4-U Co. |25 Hour Parts Co. Rejected 53 48 70 Perfect 93 71 88 Not perfect but acceptable 22 31 22 Test an appropriate hypothesis to decide if the plant manager is correct. Give statistical evidence to support your conclusion. Tize