Question: Q 4 . Capability Ratio & Capability Index The Johnson's 7 5 - watt light bulbs are designed to have a life of 1 0

Q4. Capability Ratio & Capability Index
The Johnson's 75-watt light bulbs are designed to have a life of 1050 hours with tolerances of +-150 hours. The process that makes light bulbs has a mean of 900 hours, with a standard deviation of 40 hours. Compute the process capability ratio and the process capability index, and comment on the overall capability of the process.
Q4. Capability Ratio & Capability Index The Johnson's 75-watt light bulbs

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