A Manufacturing Plant for Recreational Vehicles Receives Shipments from Three

Essay

A manufacturing plant for recreational vehicles receives shipments from three different
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 three
samples of quality assurance inspections from the last six months, one from each of the
vendors. The data are shown in the table below.
Test an appropriate hypothesis to decide if the plant manager is correct. Give statistical
evidence to support your conclusion.