A Post Office Has a Single Line for Customers Waiting

question 21

Multiple Choice

A post office has a single line for customers waiting for the next available postal clerk.There are two postal clerks who work at the same rate.The arrival rate of customers follows a Poisson distribution,while the service time follows an exponential distribution.The average arrival rate is three per minute and the average service rate is two per minute for each of the two clerks.How long does the average person spend waiting for a clerk?

• A)3.429 minutes
• B)1.929 minutes
• C)1.143 minutes
• D)0.643 minute
• E)None of the above

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Definitions:

Life Change Units

A measure used in the study of stress to quantify the amount of life change a person experiences, often used to predict the likelihood of stress-related health outcomes.

Appraisals

Evaluations or judgments about the significance of what is happening to one's well-being.

Stressful Event

An incident or situation that causes significant pressure or anxiety, challenging an individual's ability to cope.

Frustration

The emotion experienced when one is irritated or displeased due to the inability to alter or accomplish a certain task.