The Mean Life of a Particular Brand of Light Bulb

question 61

Multiple Choice

The mean life of a particular brand of light bulb is 1000 hours and the standard deviation is 50 hours.We can conclude that at least 75% of this brand of bulbs will last between ___.

• A)900 and 1100 hours
• B)950 and 1050 hours
• C)850 and 1150 hours
• D)800 and 1200 hours
• E)1050 and 1250 hours

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Definitions:

Healthier Environments

Conditions or settings that promote well-being and prevent disease among the population by managing environmental risk factors.

Paul Ehrlich

A scientist known for his work in the fields of immunology and population control.

Julian Simon

An American economist known for his work on population, natural resources, and immigration, emphasizing that human ingenuity can solve many perceived problems.

Resource Prices

The costs associated with the factors of production, including land, labor, and capital.