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There is a run of five above the central line.

QUESTION $20$

What are the names of the two types of variation found in production systems?

Answers:

special cause

common cause

QUESTION $21$

A metal fabricator produces connecting rods with an outer diameter that has a $5+-0\mathrm{.}10$ meters specification. A machine over time and determines that sample mean outer diameter to be $4\mathrm{.}95$ meters with a process standard deviation of $0\mathrm{.}05$

Questions:

What is the process capability index for this example? $(3$ points$)$

$2.$ Based on your answer in part a$,$ is the process capable of producing ONLY good parts? Justify$\_$your answer. $(2$

Answers:

$1$

$2.$

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