Question: A processing plant wants to buy a new machine. Based on this new machine, the process standard deviation, , will be 0.7. They measured X

  1. A processing plant wants to buy a new machine. Based on this new machine, the process standard deviation, , will be 0.7. They measured X to be = 50, with Upper Control Specs = 53, and Lower Control Specs = 48.

Compute the Process Capability Index Cpk.

Based on Cpk, should the machine be purchased?.

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