/* This sas program will produce the estimates in Example 5.6
    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 coots;
   infile '~atsll/public/stp535/bookdata/coots.dat' delimiter=',' firstobs=2;
   input clutch csize length breadth volume tmt;
   relwt = csize/2;

proc print data=coots;

 /*  For the coots data we do not know the number of units in population */
 /*  Must include the weight variable since observation units have
     unequal weights */

proc surveymeans data=coots;
   cluster clutch;
   var volume;
   weight relwt;