By eliminating the work involved in describing clusters that are not selected, multistage sampling can reduce the large costs associated with traditional cluster sampling.
12.
They used a two-stage cluster sample design to produce a nationally representative sample of undergraduate college students aged greater than or equal to 18 years.
13.
Multistage sampling can be a complex form of cluster sampling because it is a type of sampling which involves dividing the population into groups ( or clusters ).
14.
Using techniques such as systematic sampling and cluster sampling we can effectively sample a fixed fraction of the entire material ( without the need to delineate a reference volume ).
15.
A cluster sample survey was undertaken throughout Iraq during September 2004.33 clusters of 30 households each were interviewed about household composition, births, and deaths since January 2002.
16.
For this reason, cluster sampling requires a larger sample than SRS to achieve the same level of accuracy but cost savings from clustering might still make this a cheaper option.
17.
Within probability sampling, there are specialized techniques such as stratified sampling and cluster sampling that improve the precision or efficiency of the sampling process without altering the fundamental principles of probability sampling.
18.
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-or multi-stage.
19.
A Galveston Bay Recovery Study ( GBRS ) was a survey distributed through a random stratified cluster sampling of victims in the Galveston Bay area for research on traumatic stress and disaster exposure.
20.
The main difference between cluster sampling and stratified sampling is that in cluster sampling the cluster is treated as the sampling unit so analysis is done on a population of clusters ( at least in the first stage ).
