The Cashier Service Time at the Local Branch of the Rivertown

question 139

Multiple Choice

The cashier service time at the local branch of the Rivertown bank has an exponential distribution with a mean of 2.5 minutes. What is the probability that the service time is between 2 and 4 minutes?

• A) .2488
• B) .4493
• C) .2019
• D) .2474
• E) .1170

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Definitions:

Scala Vestibuli

A fluid-filled chamber in the cochlea of the inner ear; it lies above the scala media and begins near the oval window.

Scala Tympani

A spiral-shaped canal in the inner ear that forms part of the cochlear duct, important for the transmission of sound vibrations.

Tectorial Membrane

The tectorial membrane is a structure in the inner ear of mammals that plays a crucial role in the hearing process by interacting with the hair cells of the organ of Corti.

Vestibular Membrane

A thin membrane that separates the perilymphatic space of the cochlea from the endolymphatic space, significant in the process of hearing.