A Design Engineer Wants to Construct a Sample Mean Chart

question 61

Multiple Choice

A design engineer wants to construct a sample mean chart for controlling the service life of a halogen headlamp his company produces. He knows from numerous previous samples that this service life is normally distributed with a mean of 500 hours and a standard deviation of 20 hours. On three recent production batches, he tested service life on random samples of four headlamps, with these results

What is the sample mean service life for sample 2?

• A)460 hours
• B)495 hours
• C)500 hours
• D)515 hours
• E)525 hours

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Definitions:

Maslow Hierarchy

A psychological theory proposed by Abraham Maslow that outlines a five-tier model of human needs, from basic (physiological) to higher needs (self-actualization).

Lowest Level Need

Refers to the most basic or foundational requirements in a hierarchy of needs, typically associated with physiological or survival needs.

Personal Needs

Personal needs refer to the essential requirements necessary for an individual to achieve basic satisfaction, including physical, social, and psychological needs.

Need For Achievement

A psychological trait characterized by a strong desire to accomplish challenging tasks and meet high standards of success.