If $\overline { \mathrm { X } }$
And R charts are used to control a manufacturing process,an ______ chart is analyzed first and brought into a state of statistical control before preparing the _______ chart.
A)R,
$\overline { \mathrm { X } }$
B) $\overline { \mathrm { X } }$

Question

Quizplus · Accepted Answer

The R chart looks at the variability within subgroups whereas the $\overline { \mathrm { X } }$ chart looks at the average of the subgroups. It is important to first bring the variability under control before looking at the average. This is why the R chart is analyzed first and brought into a state of statistical control before preparing the $\overline { \mathrm { X } }$ chart.

If X‾\overline { \mathrm { X } }X And R Charts Are Used to Control a Manufacturing Process,an

If $\overline { \mathrm { X } }$ And R Charts Are Used to Control a Manufacturing Process,an