The Average Wait Time at a McDonald's Drive-Through Window Is

question 108

Short Answer

The average wait time at a McDonald's drive-through window is about three minutes ("The Doctor Will See You Eventually," The Wall Street Journal, October 18, 2010). Suppose the wait time is exponentially distributed. What is the probability that a randomly selected customer will have to wait no more than five minutes?

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Definitions:

Enthusiasm

Intense and eager enjoyment, interest, or approval.

Laughter

A vocal expression of amusement, joy, or happiness, often involving audible bursts of sound.

Negative Emotions

Feelings that are generally considered undesirable, such as sadness, anger, fear, or jealousy, often resulting from adverse situations.

Anxiety

A feeling of worry, nervousness, or discomfort about something with an uncertain outcome.