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Statements

Subject Item: dbr:Mortality_rate
dbo:wikiPageWikiLink: dbr:Multistage_sampling

Subject Item: dbr:Multistage
dbo:wikiPageWikiLink: dbr:Multistage_sampling
dbo:wikiPageDisambiguates: dbr:Multistage_sampling

Subject Item: dbr:Multistage_sampling
rdf:type: yago:Method105660268 yago:Ability105616246 yago:WikicatSamplingTechniques yago:Cognition100023271 yago:PsychologicalFeature100023100 yago:Know-how105616786 yago:Technique105665146 yago:Abstraction100002137
rdfs:label: Campionamento multistadio Multistage sampling
rdfs:comment: Il Campionamento a due o più stadi è un piano di campionamento complesso, nel quale la popolazione viene suddivisa in strati (p.es. divisa per comune di residenza), solo alcuni dei quali vengono estratti a caso e all'interno di questi strati estratti si estrae a sua volta un campione casuale secondo un ulteriore piano di campionamento. Solitamente si tratta di una variante del campionamento a grappoli in cui però all'interno dei grappoli estratti non vengono esaminate tutte le unità elementari presenti ma solo una parte di esse estratte casualmente (normalmente un ). In statistics, multistage sampling is the taking of samples in stages using smaller and smaller sampling units at each stage. 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). Then, one or more clusters are chosen at random and everyone within the chosen cluster is sampled. 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
dcterms:subject: dbc:Market_research dbc:Sampling_techniques
dbo:wikiPageID: 76532
dbo:wikiPageRevisionID: 1064347770
dbo:wikiPageWikiLink: dbr:Cluster_sampling dbr:Australian_Bureau_of_Statistics dbc:Market_research dbr:Simple_Random_Sample dbc:Sampling_techniques dbr:Sample_(statistics) dbr:Stratified_sampling dbr:Statistics
dbo:wikiPageExternalLink: n21:multistage-sampling.html
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dbp:wikiPageUsesTemplate: dbt:Statistics dbt:More_citations_needed dbt:Reflist dbt:Ambiguous
dbo:abstract: Il Campionamento a due o più stadi è un piano di campionamento complesso, nel quale la popolazione viene suddivisa in strati (p.es. divisa per comune di residenza), solo alcuni dei quali vengono estratti a caso e all'interno di questi strati estratti si estrae a sua volta un campione casuale secondo un ulteriore piano di campionamento. Solitamente si tratta di una variante del campionamento a grappoli in cui però all'interno dei grappoli estratti non vengono esaminate tutte le unità elementari presenti ma solo una parte di esse estratte casualmente (normalmente un ). In statistics, multistage sampling is the taking of samples in stages using smaller and smaller sampling units at each stage. 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). Then, one or more clusters are chosen at random and everyone within the chosen cluster is sampled. Using all the sample elements in all the selected clusters may be prohibitively expensive or unnecessary. 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 makes it unnecessary to create a list of every dwelling in the region and necessary only for selected blocks. In remote areas, an additional stage of clustering is used, in order to reduce travel requirements. 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- or multi-stage. 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 * Not as accurate as Simple Random Sample if the sample is the same size * More testing is difficult to do
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dbo:wikiPageLength: 2987
foaf:isPrimaryTopicOf: wikipedia-en:Multistage_sampling

Subject Item: dbr:Cluster_sampling
dbo:wikiPageWikiLink: dbr:Multistage_sampling

Subject Item: dbr:Sampling_(statistics)
dbo:wikiPageWikiLink: dbr:Multistage_sampling

Subject Item: dbr:Simple_random_sample
dbo:wikiPageWikiLink: dbr:Multistage_sampling

Subject Item: dbr:Survey_of_Consumer_Finances
dbo:wikiPageWikiLink: dbr:Multistage_sampling

Subject Item: dbr:List_of_statistics_articles
dbo:wikiPageWikiLink: dbr:Multistage_sampling

Subject Item: dbr:Nonprobability_sampling
dbo:wikiPageWikiLink: dbr:Multistage_sampling

Subject Item: dbr:Stratified_sampling
dbo:wikiPageWikiLink: dbr:Multistage_sampling

Subject Item: dbr:Outline_of_marketing
dbo:wikiPageWikiLink: dbr:Multistage_sampling

Subject Item: dbr:Quantitative_marketing_research
dbo:wikiPageWikiLink: dbr:Multistage_sampling

Subject Item: dbr:Multi-stage_sampling
dbo:wikiPageWikiLink: dbr:Multistage_sampling
dbo:wikiPageRedirects: dbr:Multistage_sampling

Subject Item: wikipedia-en:Multistage_sampling
foaf:primaryTopic: dbr:Multistage_sampling