A Company That Receives Most of Its Orders by Telephone

question 144

Multiple Choice

A company that receives most of its orders by telephone conducted a study to determine how long customers were willing to wait on hold before ordering a product.The length of waiting time was found to be a variable best approximated by an exponential distribution with a mean length of waiting time equal to 3 minutes (i.e.the mean number of calls answered in a minute is 1/3) .What proportion of customers having to hold more than 1.5 minutes will hang up before placing an order?

• A)0.86466
• B)0.60653
• C)0.39347
• D)0.13534

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Definitions:

Auditory Hallucinations

Perceptions of hearing noises or sounds, such as voices, music, or ringing, in the absence of external stimuli.

Positive Symptom

In psychology, observable behaviors or thoughts, such as hallucinations or delusions, that are present in disorders but not in healthy individuals.

Schizophrenia

A long-term mental disorder involving a breakdown in the relation between thought, emotion, and behavior, leading to faulty perception, inappropriate actions and feelings, and a withdrawal from reality.

Identical Twins

Twins originating from the division of one fertilized egg, which then develops into two individuals with the same genetic makeup.