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 sample proportion of reworked electrical components is 46/450 = 0.1022. Using this proportion, the standard error, and the z-score for a 99% confidence interval, the interval is calculated as (0.0652, 0.1388).

One Division of a Large Defense Contractor Manufactures Telecommunication Equipment