Date:         Fri, 21 Sep 2007 13:52:49 -0400
Reply-To:     Sophia Tong <sophidt@HOTMAIL.COM>
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         Sophia Tong <sophidt@HOTMAIL.COM>
Subject:      How to randomly divide sample in 2 groups

Dear all,
 I have 400 people in a pool, want to randomly assign them into 2 groups,
200 each without any restrictions. What's right way of doing it?

I have tried somthing like

DATA want;
  SET have;
  SEED=339487731;
  R=RANUNI(SEED);
  R2=ROUND(1+R);
  RUN;

But the R2 won't give me 200/200. Please help.

Thanks,

Sophia