Question $9$

For a cookie making process, the USL and LSL sugar content in $100$ grams

of cookies are $27$ grams and $33$ grams. If the cookie maker wants the

process to have process capability index $Cp$ equal to $2,$ what should be

the standard deviation of number of grams of sugar in $100$ grams of

cookies?

$0\mathrm{.}5$ grams

$3$ grams

$1$ grams

$2$ grams