A major television manufacturer has determined that its 40 inch LED televisions to have a mean service life

QUESTION:

A major television manufacturer has determined that its 40-inch LED televisions to have a mean service life that can be modeled by a normal distribution with a mean of six years and a standard deviation of one- half year.

a. What probability can you assign to service lives of at least?

(1) Five years?

(2) Six years?

(3) Seven and one- half years?

b. If the manufacturer offers service contracts of four years on these televisions what percentage can be expected to fail from wear- out during the service period?


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