representative sample


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Related to representative sample: Sample size

representative sample

[¦rep·ri¦zen·təd·iv ′sam·pəl]
(mining engineering)
In testing or valuation of a mineral deposit, a sample so large and average in composition as to be considered representative of a specified volume of the surrounding ore body.
(statistics)
A sample whose characteristics reflect those of the population from which it is drawn.

representative sample

a SAMPLE which is (or is assumed to be) a true reflection of the parent population, i.e. has the same profile of attributes, e.g. age structure, class structure, educational background. A representative sample is achieved by ensuring that its selection is entirely random (see RANDOM SAMPLE). It is essential that a sample is representative in order that the conclusions drawn from its study can be accepted as valid information about the parent population. See also SAMPLING ERROR, SAMPLING FRAME, PROBABILITY.
References in periodicals archive ?
The nationally representative sample of adult men and women from across the four provinces was further asked the following question, 'Some people think that the Panama Leaks case decision came in favour of Nawaz Sharif, while some say that it came against him, while others say that the decision was neither in his favour nor against him.
A sampler suction tube strainer placed just down stream of the turbulence will give a more representative sample of the flow.
a) Research on a representative sample of the business of foreign residents in Germany to a sample size approx.
In this test, a dried representative sample of molding sand is placed in a tall-form 1000 ml beaker.
The study was conducted by HCD Research during February 4-5, among a nationally representative sample of Americans over the age of 18.
The contract is to investigate the perception of the podlasie province, to be carried out among a representative sample of foreign business (entities from agriculture, industry, services, institutions, etc.
The research is proceeding in three phases: chapter focus groups, all-member e-survey and an in-depth paper survey to be sent to a representative sample of the membership throughout the world.
The data came from the Massachusetts Youth Risk Behavior Survey, which was conducted among a representative sample of high school students.
Zhou of the Department of Housing and Urban Development (HUD) and his colleagues sampled dust, play-yard soil, and residues on windowsills and other surfaces at 168 sites that make up a representative sample of the nearly 100,000 licensed child-care centers in the United States.
Javelin independently selected participants at random, ensuring a representative sample of LifeLock subscribers.
These two data-collection methods will help identify perceptions held by IABC members and provide information needed to design a detailed survey that will go to a representative sample of members later this year.
The number and distribution of galaxies in the mammoth survey, based in Australia and known as 2dF or 2-degree field, provide a representative sample of the local universe, Glazebrook and Baldry note.

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