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.Based on a random sample of 450 electrical components, they find that 46 had to be reworked.The 99% confidence interval is ________________________ .
A)0.0652, 0.1388
B)0.0432, 0.1608
C)0.0763, 0.1277
D)0.0541, 0.1499
E)None of the above.

Question

Quizplus · Accepted Answer

The correct answer is A because the 99% confidence interval for the percentage of electrical components that are reworked is 0.0652 to 0.1388. This interval does not include the percentage of non-electrical components that are reworked (12%), so we can conclude that the percentage of electrical components that are reworked is different from the percentage of non-electrical components that are reworked.

One Division of a Large Defense Contractor Manufactures Telecommunication Equipment