A Cpk index greater than $........$ is a capable process, one that generates fewer than $2\mathrm{.}7$ defects per $1000$ at the $\backslash$pm $3\backslash$sigma level.

$2$

$1\mathrm{.}67$

$1\mathrm{.}33$

$1$

$0\mathrm{.}5$