Use the fоllоwing nаrrаtive аnd data tо answer questions 17 - 19. 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 believes that the defect issue is dependent on the parts vendor. The plant manager reviews a sample of quality assurance inspections from the last six months. Vendor Part Quality Perfect Parts Co. Made 4-U Co. 25 Hour Parts Co. Total Rejected 53 48 70 171 Perfect 93 71 88 252 Not Perfect, but Acceptable 22 31 22 75 Total 168 150 180 498 Which of the following are the appropriate hypotheses to test the plant manager’s belief?