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QUESTION $21$

$8$ points

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

Questions:

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

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

Answers:

QUESTION $22$

$9$ points

Five samples of $50$ parts each were taken from an ongoing process to establish a control where $z=3.$ The samples and the number of defects in each sample are shown in the table below.

$\backslash$table$[[$Sample$,$Number Inspected,Number of Defects$],[1,50,5],[2,50,4]]$

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