/* This sas program will select a sample of size 2 from the population
    in Example 6.8 of Sampling:  Design and Analysis by Sharon L. Lohr,
    using Version 7 of SAS */

 /* Author:  S. Lohr, 3/99.  Copyright (c) Sharon L. Lohr, 1999*/

options ls=78 ps=35;
 
data superm;
   input store $ storesz;
   cards;
A 100
B 200
C 300
D 1000
;

proc print data=superm;

 /* Note:  the other methods in SAS version 7 will not work for this
    example because store D has more than half the total area */
proc surveyselect data=superm out=supsamp sampsize=2 method=pps_sys ;
   id store;
   size storesz;

proc print data=supsamp;