Understanding Surveys in Three Steps: Samples

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Medialab-Prado
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There are three fundamental elements that have to be taken into consideration when interpreting the results of a survey. The first and elemental one is the type of sample used, which will tell us if the survey has representative value or not. If it does not, it might be recommendable to not use it at all. The second step concerns the careful reading of the questions and answers used: the, intentional or unintentional, choice of words can greatly influence the results of the survey. The third element is the margin of error: the little differences might not be significant, that is, we do not know if they correspond with differences in the population.