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

question 56

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,what is the probability that the sample mean lifetime is more than 1,550 hours?

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Definitions:

Double Covalent Bonds

Chemical bonds formed by the sharing of two pairs of electrons between two atoms, creating a strong link in the molecule structure.

Fatty Acid

Organic compounds consisting of a hydrocarbon chain and a terminal carboxyl group, important components of lipids in the body such as fats and oils, playing key roles in energy storage and cell structure.

Carbon Chain

A series of carbon atoms linked together, which can be straight, branched, or arranged in rings, forming the backbone of organic molecules.

Triglycerides

A type of fat (lipid) found in your blood, used by the body for energy but high levels can increase the risk of heart disease.