A manufacturing plant for recreational vehicles receives shipments from three different parts vendors. There has been a defect issue with some of the electrical wirings 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 and uses the following information to conduct a chi-square test.

	Perfect 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

Round off the answers to 4 decimal places and units of measurement should be quoted whenever they are appropriate.

a. State the competing hypotheses to test the plant manager's belief. b. Calculate the expected frequencies. c. What is the value of the test statistic and its associated -value? d. State the conclusion at = 0.05.