例06-05程序.sas

SAS应用_医学统计学的例题程序及其结果,学习SAS的必备资料.

data ex6_5;
  n1=120;
  n2=110;
  x1=36;
  x2=22;
  p1=x1/n1;
  p2=x2/n2;
  pc=(x1+x2)/(n1+n2);
  sp=sqrt(pc*(1-pc)*(1/n1+1/n2)) ;
  u=(p1-p2)/sp;
  p=(1-probnorm(abs(u)))*2;
  format u p 8.4;
proc print;
  var pc sp u p;
run;