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multistage sampling

What is a Complex Sample Part 2: What is it and Why Would You Ever Want to Use One?

by Karen Grace-Martin  1 Comment

In our last article, we talked about simple random samples.  Simple random samples are, well…simple, but they’re not always optimal or even possible.

Probability samples that don’t meet the assumptions of Simple Random Samples are called Complex Samples.

You’ll also hear the term Complex Survey, which is really just a survey that incorporates some sort of complex sampling design.  Because of their size and research goals, surveys are usually* the only type of research study that uses complex samples.

(*but not always.  I have seen intervention studies, for example, that used complex sampling).

What is a Complex Sample?

The most defining feature of a complex sample is that sample members do not have equal probability of being selected.

That sounds simple enough.  But… [Read more…] about What is a Complex Sample Part 2: What is it and Why Would You Ever Want to Use One?

Tagged With: cluster sampling, complex sample, Complex Survey, finite populations, multistage sampling, oversampling, sampling without replacement, stratification

Related Posts

  • Target Population and Sampling Frame in Survey Sampling
  • What is Complex Sampling? Part 4: Cluster Sampling
  • What is a Complex Sample Part 3: Stratified Sampling
  • What is a Complex Sample? Part 1: Simple Random Samples

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