A Statistics Professor Receives an Average of Five E-Mail Messages

question 29

Multiple Choice

A statistics professor receives an average of five e-mail messages per day from students. Assume the number of messages approximates a Poisson distribution. What is the probability that on a randomly selected day she will have two messages?

• A) 0.0067
• B) 0.0014
• C) 0.420
• D) 0.084

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Definitions:

Market Share

The percentage of an industry's total sales that is earned by a particular company over a specified time period.

Demand

The quantity of a good or service that consumers are willing and able to purchase at various prices during a given period.

Gas Station

A facility where gasoline (petrol) and often other fuels and automotive products are sold to motorists.

Unavailability of Substitutes

A market condition where consumers have no alternative products or services to choose from, often leading to less price sensitivity.