The Mean Life of a Pair of Shoes Is 40

question 35

Multiple Choice

The mean life of a pair of shoes is 40 months with a standard deviation of 8 months.If the life of the shoes is normally distributed,how many pairs of shoes out of one million will need replacement before 36 months?

• A) 500,000
• B) 808,500
• C) 191,500
• D) 308,500

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Definitions:

Basilar Membrane

A membrane in the cochlea of the inner ear, playing a critical role in the perception of sound by vibrating in response to frequencies.

Auditory Canal

A tube-like structure that leads from the outer ear to the eardrum, transmitting sound waves to the middle ear.

Eardrum

A thin membrane that vibrates in response to sound waves, transmitting these vibrations to the inner ear.

Ossicles

A set of three small bones located in the middle ear, involved in transmitting sound waves to the inner ear.