The Manager of a Video Library Would Like the Variance

question 20

Multiple Choice

The manager of a video library would like the variance of the waiting times of the customers not to exceed 2.30 minutes-squared. He would like to add an additional billing counter if the variance exceeds the cut-off. He checks the recent sample data. For a random sample of 24 customer waiting times, he arrives at a sample variance of 3.8 minutes-squared. The manager assumes the waiting times to be normally distributed. Which of the following is the correct approximation of the p-value used to conduct this test?

• A) p-value lies between 0.005 and 0.010
• B) p-value lies between 0.010 and 0.025
• C) p-value lies between 0.050 and 0.10
• D) p-value lies between 0.025 and 0.05

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Definitions:

Ossicles

Three small bones in the middle ear that help in transmitting sound vibrations from the air to the fluid-filled cochlea.

Wavelength

The distance between successive crests of a wave, especially points in a sound wave or electromagnetic wave.

Sense of Color

is the capacity to perceive and distinguish between different colors, including their hues, saturation, and brightness, primarily mediated by the cone cells in the human eye.

Iris

The colored part of the eye that controls the size of the pupil and the amount of light that enters the eye.