Training Educators to Design and Develop ODL Materials/Needs Analysis/RANDOM SAMPLING

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In random sampling, all items have some chance of selection that can be calculated. Random sampling technique ensures that bias (see: page 179) is not introduced regarding who is included in the survey. Five common random sampling techniques are:

  • simple random sampling,
  • systematic sampling,
  • stratified sampling,
  • cluster sampling, and
  • multi-stage sampling.