Multistage sampling

Multistage sampling

Multistage sampling is a complex form of cluster sampling.

Advantages

  • cost and speed that the survey can be done in
  • convenience of finding the survey sample
  • normally more accurate than cluster sampling for the same size sample

Disadvantages

  • Is not as accurate as SRS if the sample is the same size
  • More testing is difficult to do

Using all the sample elements in all the selected clusters may be prohibitively expensive or not necessary. Under these circumstances, multistage cluster sampling becomes useful. Instead of using all the elements contained in the selected clusters, the researcher randomly selects elements from each cluster. Constructing the clusters is the first stage. Deciding what elements within the cluster to use is the second stage. The technique is used frequently when a complete list of all members of the population does not exist and is inappropriate.

In some cases, several levels of cluster selection may be applied before the final sample elements are reached. For example, household surveys conducted by the Australian Bureau of Statistics begin by dividing metropolitan regions into 'collection districts', and selecting some of these collection districts (first stage). The selected collection districts are then divided into blocks, and blocks are chosen from within each selected collection district (second stage). Next, dwellings are listed within each selected block, and some of these dwellings are selected (third stage). This method means that it is not necessary to create a list of every dwelling in the region, only for selected blocks. In remote areas, an additional stage of clustering is used, in order to reduce travel requirements.[1]

Although cluster sampling and stratified sampling bear some superficial similarities, they are substantially different. In stratified sampling, a random sample is drawn from all the strata, where in cluster sampling only the selected clusters are studied, either in single stage or multi stage.


See also

References

http://had.co.nz/notes/surveys-expt/multistage-sampling.html


Wikimedia Foundation. 2010.

Игры ⚽ Нужно решить контрольную?

Look at other dictionaries:

  • Sampling (statistics) — Sampling is that part of statistical practice concerned with the selection of individual observations intended to yield some knowledge about a population of concern, especially for the purposes of statistical inference. Each observation measures… …   Wikipedia

  • Multistage — may refer to: Armitage–Doll multistage model of carcinogenesis Multistage amplifiers Multistage centrifugal pump Multi stage flash distillation Multistage interconnection networks Multistage rocket Multistage sampling Multistage testing …   Wikipedia

  • Nonprobability sampling — Sampling is the use of a subset of the population to represent the whole population. Probability sampling, or random sampling, is a sampling technique in which the probability of getting any particular sample may be calculated. Nonprobability… …   Wikipedia

  • Cluster sampling — is a sampling technique used when natural groupings are evident in a statistical population. It is often used in marketing research. In this technique, the total population is divided into these groups (or clusters) and a sample of the groups is… …   Wikipedia

  • Survey sampling — In statistics, survey sampling is random selection of a sample from a finite population. It is an important part of planning statistical research and design of experiments. Sophisticated sampling techniques that are both economical and… …   Wikipedia

  • Outline of marketing — The following outline is provided as an overview of and topical guide to marketing: Marketing refers to the social and managerial processes by which products, services and value are exchanged in order to fulfil individuals or group s needs and… …   Wikipedia

  • List of statistics topics — Please add any Wikipedia articles related to statistics that are not already on this list.The Related changes link in the margin of this page (below search) leads to a list of the most recent changes to the articles listed below. To see the most… …   Wikipedia

  • Simple random sample — In statistics, a simple random sample is a subset of individuals (a sample) chosen from a larger set (a population). Each individual is chosen randomly and entirely by chance, such that each individual has the same probability of being chosen at… …   Wikipedia

  • Quantitative marketing research — is the application of quantitative research techniques to the field of marketing. It has roots in both the positivist view of the world, and the modern marketing viewpoint that marketing is an interactive process in which both the buyer and… …   Wikipedia

  • List of marketing topics — This is a list of marketing topics. Marketing fundamentals * [ [Marketing] * Consumer * Business Marketing * Core * Customer ** Customer lifetime value (CLV) ** Customer relationship management (CRM) * Marketing mix * Marketing orientation, also… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”