The Mean Life of a Particular Brand of Light Bulb

question 4

Multiple Choice

The mean life of a particular brand of light bulb is 1200 hours and the standard deviation is 50 hours.We can conclude that at least 75% of this brand of bulbs will last between _______.

• A)1100 and 1300 hours
• B)1150 and 1250 hours
• C)1050 and 1350 hours
• D)1000 and 1400 hours
• E)950 and 1450 hours

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Definitions:

Distance Zone

An area surrounding a person regarded as their personal space, which varies in size depending on cultural norms and personal preferences.

Negative Mental Barriers

Psychological obstacles that hinder a person's ability to accept new ideas or make positive decisions, often affecting sales interactions.

Presentation

The act of offering or showing a product, idea, or business proposal to an audience or client.

Nonverbal Cues

Forms of communication without words, such as body language, gestures, and facial expressions, that convey meaning or emotion.