Plotting OC Curves for Mean Charts
/****************************************************************/
/* S A S S A M P L E L I B R A R Y */
/* */
/* NAME: SHWOC1 */
/* TITLE: Plotting OC Curves for Mean Charts */
/* PRODUCT: QC */
/* SYSTEM: ALL */
/* KEYS: Shewhart Charts, Mean Charts, OC Curves, */
/* PROCS: GPLOT */
/* DATA: */
/* */
/* REF: SAS/QC Software: Usage and Reference, Version 6, */
/* First Edition, Volume 1 and Volume 2 */
/* */
/****************************************************************/
data oc;
keep prob nSample t plot2;
plot2=.;
do nSample=1, 2, 3, 4, 16;
do j=0 to 400;
t=j/100;
prob=probnorm( 3-t*sqrt(nSample)) -
probnorm(-3-t*sqrt(nSample));
output;
end;
end;
label t ='Shift in Population Mean (Unit=Std Dev)'
prob='Probability of Not Detecting Shift';
run;
proc sgplot data=oc;
series x=t y=prob /
group=nSample lineattrs=(pattern=solid thickness=2);
yaxis grid;
label nSample='Sample Size';
run;