The Mean Life of a Particular Brand of Light Bulb

question 50

Multiple Choice

The mean life of a particular brand of light bulb is 1000 hours and the standard deviation is 50 hours.Tests show that the life of the bulb is approximately normally distributed.It can be concluded that approximately 68% of the 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:

Habit

A regular behavior or practice that an individual performs automatically.

Comfort

A state of physical and emotional ease, often achieved through supportive environments or relationships.

Security

Measures or protocols taken to ensure the safety and protection of assets, data, and individuals from theft, harm, or other threats.

Need For Change

The requirement or motivation for making alterations or adjustments in one's personal life, work environment, or society.