PROC SURVEYSELECT: PROC SURVEYSELECT Statement :: SAS/…
https://support.sas.com/documentation/cdl/en/statug/63347/HTML/default/statug_surveyselect_sect007.htm
Whether or not you specify the SEED= option, PROC SURVEYSELECT displays the value of the initial seed in the "Sample Selection Summary" table. If you need to reproduce the same sample in a subsequent execution of PROC SURVEYSELECT, you can specify this same seed value in the SEED= option, along with the same sample selection parameters, and ...
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