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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Crowding-Out

A situation where increased government spending leads to a reduction in private sector spending.

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Expenditures made by the government for goods and services that are necessary for the public sector and to support economic activity.

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