Interpreting P-P Plots
/****************************************************************/
/* S A S S A M P L E L I B R A R Y */
/* */
/* NAME: CAPPP2 */
/* TITLE: Interpreting P-P Plots */
/* PRODUCT: QC */
/* SYSTEM: ALL */
/* KEYS: Capability Analysis, Probability-Probability Plots, */
/* PROCS: CAPABILITY */
/* DATA: */
/* */
/* SUPPORT: saswgr */
/* REF: SAS/QC Software: Usage and Reference, Version 6, */
/* First Edition, Volume 1 and Volume 2 */
/* MISC: */
/* */
/* Examples in the documentation were created using the */
/* statement: ods listing style=statistical; */
/* */
/****************************************************************/
data Sheets;
input Distance @@;
label Distance='Hole Distance in cm';
datalines;
9.80 10.20 10.27 9.70 9.76
10.11 10.24 10.20 10.24 9.63
9.99 9.78 10.10 10.21 10.00
9.96 9.79 10.08 9.79 10.06
10.10 9.95 9.84 10.11 9.93
10.56 10.47 9.42 10.44 10.16
10.11 10.36 9.94 9.77 9.36
9.89 9.62 10.05 9.72 9.82
9.99 10.16 10.58 10.70 9.54
10.31 10.07 10.33 9.98 10.15
;
proc capability data=Sheets noprint;
ppplot Distance / normal(mu=9.5 sigma=0.3) square;
ppplot Distance / normal(mu=10 sigma=0.5) square;
run;