The Mean Life of Pair of Shoes Is 40 Months

question 87

Multiple Choice

The mean life of pair of shoes is 40 months with a standard deviation of 8 months.If the life of the shoes is normally distributed,how many pairs of shoes out of one million will need replacement before 36 months?

• A)500,000
• B)808,500
• C)191,500
• D)308,500

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Definitions:

Extended Period

A length of time that is longer than usual or expected.

Primary Group

A small social group characterized by close, personal, and enduring relationships, which significantly influence the attitudes and ideals of those involved.

Concert Audience

The group of people who attend and watch a musical performance at a concert venue.

Secondary Group

A large and impersonal social group whose members pursue a specific goal or activity but typically have a detached and superficial relationship with one another.