cluster sampling - translation to Αγγλικά
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cluster sampling - translation to Αγγλικά

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
  • Cluster sampling. A group of twelve people are divided into pairs, and two pairs are then selected at random.

cluster sampling         
cluster sampling выборочное обследование
cluster sampling         
1) групповой выбор
2) выборочное обследование по группам
cluster sample         

общая лексика

гнездовая выборка

групповая выборка

Ορισμός

cluster bomb
(cluster bombs)
A cluster bomb is a type of bomb which is dropped from an aircraft. It contains a large number of smaller bombs that spread out before they hit the ground.
N-COUNT

Βικιπαίδεια

Cluster sampling

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.

In this sampling plan, the total population is divided into these groups (known as clusters) and a simple random sample of the groups is selected. The elements in each cluster are then sampled. If all elements in each sampled cluster are sampled, then this is referred to as a "one-stage" cluster sampling plan. If a simple random subsample of elements is selected within each of these groups, this is referred to as a "two-stage" cluster sampling plan. A common motivation for cluster sampling is to reduce the total number of interviews and costs given the desired accuracy. For a fixed sample size, the expected random error is smaller when most of the variation in the population is present internally within the groups, and not between the groups.

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.
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