Let the Time Between Two Consecutive Arrivals at a Grocery

question 23

Multiple Choice

Let the time between two consecutive arrivals at a grocery store checkout line be exponentially distributed with a mean of three minutes. Find the probability that the next arrival does not occur until at least four minutes have passed since the last arrival.

• A) 0.0000
• B) 0.2636
• C) 0.4724
• D) 0.7364

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Definitions:

Ossicle

Small bones, particularly referring to the three bones found in the middle ear: the malleus, incus, and stapes.

Otoscopy

A medical examination technique that involves looking inside the ear using an instrument called an otoscope.

Electronystagmography

A diagnostic test that records involuntary movements of the eye (nystagmus) to assess the vestibular system.

Tympanometry

A test that measures the movement of the eardrum in response to changes in air pressure, used to diagnose issues in the middle ear.