Sammy Electronics have determined that its 50 inch LED television has a mean service life of 6 years that can be modeled by a normal distribution and a standard deviation of 1/2 year.    a. What probability can you assign to service lives of at least 5 years?    b. If Sammy offers service warranty of four years on these televisions, what percentage can be expected to fail from wear out during the service period?    c. What warranty period would achieve an expected wear-out rate of 5%?

MATLAB: An Introduction with Applications
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Sammy Electronics have determined that its 50 inch LED television has a mean service life of 6 years that can be modeled by a normal distribution and a standard deviation of 1/2 year.

   a. What probability can you assign to service lives of at least 5 years?

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

   c. What warranty period would achieve an expected wear-out rate of 5%?

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