One Division of a Large Defense Contractor Manufactures Telecommunication Equipment

Multiple Choice

One division of a large defense contractor manufactures telecommunication equipment for the military.This division reports that 12% of non-electrical components are reworked.Management wants to determine if this percentage is the same as the percentage rework for the company's electrical components.The Quality Control Department plans to check a random sample of the over 10,000 electrical components manufactured across all divisions.The resulting 95% confidence interval based on these data is .0758 to .1339.Which of the following is the correct interpretation?

A) The percentage of electronic components that are reworked is between 7.6% and 13.4%.
B) We are 95% confident that between 7.6% and 13.4% of electrical components are reworked.
C) The margin of error for the true percentage of electrical components that are reworked is between 7.6% and 13.4%.
D) All samples of size 450 will yield a percentage of reworked electrical components that falls within 7.6% and 13.4%.
E) None of the above.