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:

Semantic Memory

A form of enduring memory that enables the recollection of words, ideas, or figures, crucial for language comprehension and application.

Context-dependent Memory

The theory that it is easier to retrieve certain memories when the context present at encoding is also present at retrieval.

Childhood

The period of a person's life from birth to adolescence, characterized by growth, development, and learning in a variety of domains.

Retrieval Cue

Anything that helps a person access information in long-term storage.