The Expected (Mean)life of a Particular Type of Light Bulb

question 10

Multiple Choice

The expected (mean) life of a particular type of light bulb is 1,000 hours with a standard deviation of 50 hours. The life of this bulb is normally distributed. What is the probability that a randomly selected bulb would last longer than 1150 hours?

• A) 0.4987
• B) 0.9987
• C) 0.0013
• D) 0.5013
• E) 0.5513

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Definitions:

Reciprocal Influence

The mutual impact that individuals or groups have on each other within a particular context or relationship.

Fostering Innovation

The process of encouraging and facilitating the generation, development, and implementation of new ideas, products, or methods.

Encouraging Participation

The act of motivating and creating opportunities for individuals or groups to actively engage and contribute to processes, decision-making, or activities.

Coercive Power

The exertion of control over others by enforcing compliance through fear or threat, distinct from other types of influence.