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Cluster sampling. A group of twelve people are divided into pairs, and two pairs are then selected at random. 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 terms of partition, 20 / 5 means the size of each of 5 parts into which a set of size 20 is divided. For example, 20 apples divide into five groups of four apples, meaning that "twenty divided by five is equal to four". This is denoted as 20 / 5 = 4, or 20 / 5 = 4. [2] In the example, 20 is the dividend, 5 is the divisor, and 4 is ...
In neurology, there is an established literature [5] about the innate propensity of the human brain to divide the world into us and them valence categories, where the exact membership of the in-group and out-group are socially contingent (hence vulnerable to the instruments of propaganda), and the intensity exists along a spectrum from mild to ...
Methodological work aimed at improving the accuracy of a classifier is commonly divided between cases where there are exactly two classes (binary classification) and cases where there are three or more classes (multiclass classification).
Social stratification refers to a society's categorization of its people into groups based on socioeconomic factors like wealth, income, race, education, ethnicity, gender, occupation, social status, or derived power (social and political). It is a hierarchy within groups that ascribe them to different levels of privileges. [1]
Groups of countries or regions are often referred to by a single term (word, phrase, or abbreviation). The origins of such terms include political alliances, intergovernmental organizations, business market areas, and mere colloquialism.
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If a divisible group is a subgroup of an abelian group then it is a direct summand of that abelian group. [2] Every abelian group can be embedded in a divisible group. [3] Put another way, the category of abelian groups has enough injectives. Non-trivial divisible groups are not finitely generated.