Get 2 random samples same sex age education

* Get two different random samples of cases having same sex, age and educ.


INPUT PROGRAM.
LOOP sex=1 TO 2.
- LOOP age=25 TO 35.
- LEAVE sex age.
-  LOOP #cnt=1 TO 40.
-    COMPUTE educ=RND(10+UNIFORM(8)).
-    END CASE.
-  END LOOP.
- END LOOP.
END LOOP.
END FILE.
END INPUT PROGRAM.
SAVE OUTFILE='c:\\temp\\temp.sav'.

SELECT IF ((sex=1) & (age=30) & (educ=10)).
COMPUTE draw=UNIFORM(1).
SORT CASES BY draw.
* Replace the number 2 in next line by the size of your sample; keep the.5).
COMPUTE sample = TRUNC($casenum/(2.5)).
SELECT IF sample<3.
EXECUTE.

* The cases with the sample=0 form your first random sample.
* The cases with the sample=1 form your second random sample.