Question $8$

$1$ pts

C&A Chips' potato chip filling process has a lower specification limit of $4\mathrm{.}5$ oz $.$ and an upper specification limit of $5\mathrm{.}5$ oz $.$ The standard deviation is $0\mathrm{.}3$ oz $.$ and the mean is $5$ oz $.$ What is the process capability index for the chip filling process?

$3\mathrm{.}33$

$1\mathrm{.}67$

$0\mathrm{.}56$

$0\mathrm{.}28$