Non-Probability Sampling

With Non-Probability Sampling respondents are sampled such that you cannot calculate the chance of inclusion. In this case you cannot claim you have statistical representation. Well conducted non-random surveys can still produce acceptable results. Example sample strategies are:

• Quota Sampling
  • In quota sampling relevant properties for the population are determined. Items which share characteristics are then considered to be representative of the whole population.
• Judgmental Sampling
  • No element of chance is used but 'bias' from the interviewer
• Snowball Sampling
  • Move on from an initial starting place and ask there to ask more participants
• Convenience Sampling
  • Sample is determined based on what is easy and cheap to obtain.

Part of: M7-Quantitative Decision Methods-S1 - Managing Data and Survey Methods