The Average Waiting Time at the Checkout Counter for a Large

question 155

Short Answer

The average waiting time at the checkout counter for a large grocery chain is 2.45 minutes with a standard deviation of 24 seconds (0.40 minutes).Assume that the distribution of waiting time is normal.What is the probability that a customer must wait more than 3 minutes for check out?

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Definitions:

Hysteria

An outdated psychiatric term once used to describe a symptom pattern characterized by emotional excitability and physical symptoms (e.g., convulsions, paralyses, numbness, loss of vision) without any organic cause.

Repression

A psychological defense mechanism involving the unconscious blocking of unacceptable thoughts, feelings, or impulses from conscious awareness.

Neurosis

A class of functional mental disorders involving chronic distress but neither delusions nor hallucinations.

Depersonalization

A psychological condition wherein individuals feel detached from themselves and their surroundings, as if they are observing their life from an external viewpoint.