The Manager of the Service Department of a Local Car

question 61

Multiple Choice

The manager of the service department of a local car dealership has noted that the service times of a sample of 30 new automobiles has a standard deviation of 6 minutes. A 95% confidence interval estimate for the standard deviation of the service times for all their new automobiles is

• A)16.05 to 45.72
• B)4.78 to 8.07
• C)2.93 to 6.31
• D)22.83 to 65.06

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Definitions:

Residual Volume

the amount of air remaining in the lungs after a forced exhalation, ensuring that gas exchange continues even between breaths.

Boyle's Law

A gas law stating that the pressure of a given mass of an ideal gas is inversely proportional to its volume at a constant temperature.

Respiratory Membrane

The respiratory membrane is the barrier through which gas exchange occurs between the air in the lungs and the blood in the capillaries.

Diffusion

The movement of molecules from an area of higher concentration to an area of lower concentration, a fundamental process in physics and biology.