Find and Interpret the Confidence Interval

question 11

Multiple Choice

Find and interpret the confidence interval.
-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 95% confidence interval based on this data is
) 0758 to .1339. Should management conclude that the percentage of rework for
Electrical components is lower than the rate of 12% for non-electrical components?

• A) Yes, because the lower limit of the confidence interval is 7.6%.
• B) Yes, because 12% is contained with the 95% confidence interval.
• C) No, because 12% is contained with the 95% confidence interval.
• D) No, because the upper limit of the confidence interval is 13.4%.
• E) None of the above.

---

Definitions:

Singlets

In spectroscopy, a single peak or line that represents a non-split energy level.

DEPT-90

A nuclear magnetic resonance (NMR) technique that distinguishes between CH and CH3 groups in a molecule.

DEPT-135

An NMR spectroscopy technique that distinguishes between carbon atoms attached to hydrogen atoms, depending on the number of hydrogen atoms (CH, CH2, or CH3).

Quaternary

Referring to carbon atoms bonded to four different groups, especially relevant in organic chemistry when discussing carbon structure and stereochemistry.