* Required macros: 'est_srs', 'ratio', 'regr', and 'diff';

data prob61 ;
input tree basalarea volume @@ ;
cards ;
1 .3 6  2 .5 9  3 .4 7  4 .9 19  5 .7 15  6 .2 5
7 .6 12  8 .5 9  9 .8 20  10 .4 9  11 .8 18  12 .6 13
;
proc print data = prob61 ;
proc sgplot data = prob61 ; 
scatter x=basalarea y=volume; run ;


%est_srs(sample=prob61,npop=250,response=volume,param=total) ;

%ratio(sample=prob61,npop=250,response=volume,param=total,x=basalarea,tau_x=75) ;

%regr(sample=prob61,npop=250,response=volume,param=total,x=basalarea,tau_x=75) ;

%diff(sample=prob61,npop=250,response=volume,param=total,x=basalarea,tau_x=75) ;