Systematic sampling

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As a systematic sample (also conscious choice ) refers to competitions in which subjective considerations determine the selection of the target persons.

For example, all employees with more than 10 years of service .

Prior information about the cases to be selected is used. Generalizations are not possible on the basis of mathematical-statistical models with conscious choices.

Types of conscious selection processes :

  • Theoretical Sampling ,
  • Selection of typical cases / Typical selection: Selection of those elements that are considered particularly typical or characteristic.
  • Snowball selection and
  • Quota selection ( quota sample ): As with the stratified random sample , the elements of the population are first divided into groups. Then the proportion of the individual groups in the population is determined. The sample is now to be drawn in such a way that this group ratio in the sample looks as exactly as possible as in the population.
  • Cut-off procedure (concentration principle): Selection of those elements that are particularly important, e.g. B. in capital goods market research such as the survey of leading large companies, enables the number of respondents / units to be reduced without a great loss of information regarding the object of investigation by only including those elements in the selection that are relevant to the objective of the investigation.

Individual evidence

  1. ^ Rainer Schnell, Paul B. Hill, Elke Esser: Methods of empirical social research . De Gruyter Oldenbourg, 2018, ISBN 978-3-11-057732-7 ( degruyter.com [accessed June 27, 2020]).