Handout13 Stat3900/4950

How to take a SRS from a dataset.

source: UCLA Academic Technology Services, Stat Computing, Statistical Computing Resources

http://www.ats.ucla.edu/stat/

http://www.ats.ucla.edu/stat/sas/faq/

http://www.ats.ucla.edu/stat/sas/faq/srs_surveryselect.htm

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DATA hsb25;
  INPUT id gender $ race ses schtype $ prog
        read write math science socst;
DATALINES;
 147 f 1 3 pub 1 47  62  53  53  61
 108 m 1 2 pub 2 34  33  41  36  36
  18 m 3 2 pub 3 50  33  49  44  36
 153 m 1 2 pub 3 39  31  40  39  51
  50 m 2 2 pub 2 50  59  42  53  61
  51 f 2 1 pub 2 42  36  42  31  39
 102 m 1 1 pub 1 52  41  51  53  56
  57 f 1 2 pub 1 71  65  72  66  56
 160 f 1 2 pub 1 55  65  55  50  61
 136 m 1 2 pub 1 65  59  70  63  51
  88 f 1 1 pub 1 68  60  64  69  66
 177 m 1 2 pri 1 55  59  62  58  51
  95 m 1 1 pub 1 73  60  71  61  71
 144 m 1 1 pub 2 60  65  58  61  66
 139 f 1 2 pub 1 68  59  61  55  71
 135 f 1 3 pub 1 63  60  65  54  66
 191 f 1 1 pri 1 47  52  43  48  61
 171 m 1 2 pub 1 60  54  60  55  66
  22 m 3 2 pub 3 42  39  39  56  46
  47 f 2 3 pub 1 47  46  49  33  41
  56 m 1 2 pub 3 55  45  46  58  51
 128 m 1 1 pub 1 39  33  38  47  41
  36 f 2 3 pub 2 44  49  44  35  51
  53 m 2 2 pub 3 34  37  46  39  31
  26 f 4 1 pub 1 60  59  62  61  51
;
RUN;

*Random smapling without replacement;

proc surveyselect data = hsb25 method = SRS rep = 1 
                         sampsize = 10 seed = 12345 out = hsbs1;
  id _all_;
run;
proc print data = hsbs1 noobs;
run;

*Random sampling with replacement;

proc surveyselect data=hsb25  method = urs sampsize = 10
   rep=1 seed=12345 out=hsbs2;
   id id read write math science socst;
run;
proc print data = hsbs2 noobs;
run;
            
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