Data collection - Sampling techniques

  • Created by: KGR01
  • Created on: 16-05-18 21:12
Simple random sampling
Every possible sample of a given size is equally likely to be selected.
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Stratified sampling
Sub-groups called strata are used to identify different groups that are likely to have different voting patterns. In stratified sampling, you would ensure that a random sample is taken from every strata.
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Cluster sampling
Random samples are taken from selected strata (also called clusters).
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Systematic sampling
Individuals are chosen from a sampling frame (e.g. if you were surveying telephone subscribers you might sample the 10th name on each page of the directory).
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Quota sampling
An interviewer's quota is usually specified in stratified terms (e.g. how many males/females). The choice of who is sampled is then left up to the interviewer and so is definitely non-random.
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Opportunity sampling
When circumstances make a sample readily available (e.g. the representatives at a conference of hospital doctors are used as a sample to investigate the opinions of hospital doctors in general on a particular issue).
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Self-selecting sample
When those involved volunteer to take part, or are given the choice to participate or decline (e.g. online surveys).
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Other cards in this set

Card 2

Front

Sub-groups called strata are used to identify different groups that are likely to have different voting patterns. In stratified sampling, you would ensure that a random sample is taken from every strata.

Back

Stratified sampling

Card 3

Front

Random samples are taken from selected strata (also called clusters).

Back

Preview of the back of card 3

Card 4

Front

Individuals are chosen from a sampling frame (e.g. if you were surveying telephone subscribers you might sample the 10th name on each page of the directory).

Back

Preview of the back of card 4

Card 5

Front

An interviewer's quota is usually specified in stratified terms (e.g. how many males/females). The choice of who is sampled is then left up to the interviewer and so is definitely non-random.

Back

Preview of the back of card 5
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