Abstract
Even though the importance of the sampling within scientific procedure for the knowledgegeneration has is recognized, professionals of the social and human sciences, customarily neglect
the extraction phase to a sample. In the present work we concerns very especially to accomplish
an attention call on the transcendency of this problems; at the same time, we will indicate
possible causes and some of the consequences derived. Moreover, it presents help system
software SOTAM, with the objetive to improve the samples quality.
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