Question: TEs Long Life 13-watt LED light bulbs are designed to have a life of 1125 hours with tolerances of 210 hours. The process that

TE’s Long Life 13-watt LED light bulbs are designed to have a life of 1125 hours with tolerances of  ± 210 hours. The process that makes light bulbs has a mean of 1050 hours, with a standard deviation of 55 hours. Compute the process capability ratio and the process capability index, and comment on the overall capability of the process.

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