The Average Time Before Breakdown of a Machine Is Normally

question 5

Multiple Choice

The average time before breakdown of a machine is normally distributed and has a mean of 9 weeks and a standard deviation of 1.5 weeks.If breakdown cost averages $1,500 and preventive maintenance costs $500, what is the optimal preventive maintenance interval?

• A)3.8 weeks
• B)8.4 weeks
• C)9.6 weeks
• D)6.9 weeks
• E)7.2 weeks

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Definitions:

Information Processing

The method by which individuals perceive, analyze, manipulate, store, and recall information through mental and cognitive functions.

Concrete Operations

A stage in Jean Piaget’s theory of cognitive development, typically occurring between ages 7 and 12, where children start thinking logically about concrete events.

Cognitive Development

The process of growth and change in intellectual capabilities, such as thought, reason, and problem-solving, that occurs across the lifespan.

Jean Piaget

A Swiss developmental psychologist known for his theory of cognitive development in children, emphasizing stages of growth in intellectual abilities.