Assume the Mean Useful Life of a Particular Light Bulb

question 64

Multiple Choice

Assume the mean useful life of a particular light bulb is 2,000 hours and is normally distributed with a standard deviation of 300 hours. Calculate the useful life of the light bulb within two standard deviations of the mean.

• A)Between 1,700 and 2,300 hours
• B)Longer than 2,300 hours
• C)Longer than 1,700 hours
• D)Between 1,400 and 2,600 hours

---

Definitions:

Color Perception

The process by which the brain interprets wavelengths of light as different colors, relying on the interactions of photoreceptor cells in the eyes.

Form Perception

The cognitive process of recognizing and identifying objects' shapes and structures in the environment.

Prosopagnosia

A neurological condition characterized by the inability to recognize faces, also known as face blindness.

Visual-form Agnosia

A neurological condition where a person can see objects but cannot recognize their shape, leading to an inability to identify the objects based on their forms.