Question $4$

$1$ pts

A key joint in a precision machining process has a lower specification limit of a width of $0\mathrm{.}99$ mm and an upper specification limit of $1\mathrm{.}01$ mm $.$ The standard deviation is $0\mathrm{.}005$ mm and the mean is $1$ mm $.$ The company wants to reduce its defect probability and operate a "six sigma process." To what level would this company have to reduce the standard deviation in the process to meet this target?

$0\mathrm{.}000001$

$0\mathrm{.}00001$

$0\mathrm{.}0017$

$0\mathrm{.}00017$