After a Heavy Snow, the City of Boston Spends Millions

question 104

Short Answer

After a heavy snow, the city of Boston spends millions of dollars plowing the streets. Suppose the amount of time the city must spend before the streets are clear follows a log-normal distribution. Further suppose that the average amount of time is 12 hours and the standard deviation is 5 hours. What percentage of the time does it take more than 10 hours for the streets to be cleared?

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Definitions:

Personality

A fusion of elements and qualities that establish a person's distinct individuality.

Mental Process

Operations of the mind, such as thinking, remembering, and perceiving, that enable understanding and interaction with the world.

Instincts

Inborn patterns of behavior that are biologically determined rather than learned.

Personality

The unique combination of emotional, thought, and behavioral patterns that define an individual and differentiate them from others.