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Τι (ποιος) είναι cluster sampling - ορισμός

Cluster sampling

SAMPLING METHODOLOGY IN STATISTICS

ClusterSampling; Cluster Sampling; Cluster sample; Draft:Inference When The Numbers of Clusters Is Small; User:Carolineneil/sandbox/Inference When The Numbers of Clusters Is Small

In statistics, cluster sampling is a sampling plan used when mutually homogeneous yet internally heterogeneous groupings are evident in a statistical population. It is often used in marketing research.

https://en.wikipedia.org/wiki/Cluster_sampling

Business cluster

GEOGRAPHIC CONCENTRATION OF INTERCONNECTED BUSINESSES IN A PARTICULAR FIELD

Porter's cluster; Competitive cluster; Techno-cluster; Techno cluster; Industrial Cluster; Industry cluster; Retail cluster; Vertical cluster; Horizontal cluster; Sectoral cluster; Porter's Cluster; Industrial cluster; Economic cluster; Cluster effect

A business cluster is a geographic concentration of interconnected businesses, suppliers, and associated institutions in a particular field. Clusters are considered to increase the productivity with which companies can compete, nationally and globally.

https://en.wikipedia.org/wiki/Business_cluster

Computer cluster

SET OF COMPUTERS CONFIGURED IN A DISTRIBUTED COMPUTING SYSTEM

Cluster computing; Network of Workstations; Network of workstations; Berkeley NOW Project; Clustered computing; Computer clusters; Computer ranch; Cluster of Workstations; Cluster of workstations; Cluster server; Server clustering; Cluster Server; Server cluster; Computing cluster; Computer clustering; Virtualized computer cluster; Distributed cluster; Clustered systems; PC cluster; PC farm; Cluster (computing); Linux cluster; Computer cluster in virtual machines; Cluster computer; Cluster Computing; Cluster processing

A computer cluster is a set of computers that work together so that they can be viewed as a single system. Unlike grid computers, computer clusters have each node set to perform the same task, controlled and scheduled by software.

https://en.wikipedia.org/wiki/Computer_cluster

Παραδείγματα από το σώμα κειμένου για cluster sampling

1. The technique, called "cluster sampling," is used to estimate mortality in famines and after natural disasters.

2. In addition, the biases inherent in cluster sampling, such as wording of questionnaires, would tend to undercount, rather than inflate, the number of deaths, Rush said.

3. Rising death rate Intriligator, who said he commonly uses cluster sampling in his own work, noted that the study‘s most remarkable finding was that the death rates in the country have risen from 5.5 per thousand Iraqis per year before the invasion to 13.2 per thousand per year as of the study‘s July cutoff.

4. Dr David Rush, a professor and epidemiologist at Tufts University in Boston, said: "Over the last 25 years, this sort of methodology has been used more and more often, especially by relief agencies in times of emergency." The study, published earlier this month by the Lancet medical journal, employed a method known as "cluster sampling" in which data are collected through interviews with randomly selected households.