The Batteries Used by a Calculator Have Useful Lives That

question 30

Multiple Choice

The batteries used by a calculator have useful lives that follow a Normal distribution, with an average life of 2000 hours and a standard deviation of 200 hours. In the production process, the manufacturer draws random samples of 100 batteries and determines the mean useful life of the sample. What is the standard deviation _x of this mean?

• A) 25 hours
• B) 100 hours
• C) 2 hours
• D) 20 hours

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Definitions:

Foundation of Competition

The underlying principles and conditions that drive rivalry among firms in an industry to achieve superiority.

Four-drive Theory

A motivational theory proposing that human beings are driven by the desires to acquire, bond, learn, and defend.

Esteem

Relates to the self-respect, self-worth, or regard that an individual has for themselves; can also refer to the admiration one receives from others.

Four-drive Theory

A motivational theory positing that human behavior is driven by four basic needs: the drive to acquire, bond, comprehend, and defend.