SCENARIO 7-3 The Lifetimes of a Certain Brand of Light Bulbs Are

question 23

Short Answer

SCENARIO 7-3
The lifetimes of a certain brand of light bulbs are known to be normally distributed with a mean of 1,600 hours and a standard deviation of 400 hours.A random sample of 64 of these light bulbs is taken.
-Referring to Scenario 7-3,the probability is 0.15 that the sample mean lifetime is more than how many hours?

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Definitions:

Tires

Rubber coverings placed around the rims of wheels of vehicles and bicycles to provide traction and absorb shocks, essential for the vehicle's performance and safety.

Trade

The act of buying, selling, or exchanging goods and services between people or entities within or across borders.

Microchips

Compact devices made of semiconductor material, which include integrated circuits, used across a wide range of tech applications.

Tires

Rubber coverings placed around wheels to provide traction, support the vehicle's load, and absorb shocks from the road surface.