Statistical Process Control Questions $(10$ MARKS$)$

$2\mathrm{.}5.$ Using control charts, how do we evaluate whether a process is in control?

$2\mathrm{.}6.$ What is a c$-$chart and when is it used?

$($C$01$:P$01-4$ Marks$)$

$($C$01$:P$01-2$ Marks$)$

$2\mathrm{.}7.$ Why are $\stackrel{}{x}$ and R$-$charts used together?

$($C$01$:P$01-2$ Marks$)$

$2\mathrm{.}8.$ For a $p-$chart, UCL$=0\mathrm{.}58$ and $LCL=0\mathrm{.}26.$ Then $p=$

$($CO$2$:PO$2-2$ Mark$)$

END OF QUESTION $2$