representative sample


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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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

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.
Collins Dictionary of Sociology, 3rd ed. © HarperCollins Publishers 2000
References in periodicals archive ?
If the pump or sampler is unable to perform all these functions, a representative sample will not be taken and the sampling exercise will be flawed.
(We included the 71 LSE students in the representative sample, as well as the remaining 131 LSE students in the original database of 415, for a subsample total of 202 LSE students.) The other subsample combined the remaining 213 students with ASE and HSE achievement from the representative sample (i.e., not-LSE).
In the first study, investigators analyzed survey data from three nationally representative samples of Americans aged 18 years and older, totaling 15,762 individuals.
Safer sex and condom use among a representative sample of adults.
Previous HGCA- sponsored research has confirmed that an automatic sampler fitted to the bucket of a front-loader will provide a representative sample of a lorry-load of wheat or barley.
The survey was conducted among a representative sample numbering 1,690 adult Jews living in Canada and the United States.
At UNT, 533 of the 550 students enrolled in a representative sample of 10 classes completed questionnaires for a response rate of 96.9%.
The survey, conducted by Ellison Research of Phoenix, Arizona, asked a representative sample of 695 Protestant ministers nationwide to identify the three strongest threats to families in their own communities.
Each machine tends to have a different location to provide the most representative sample for effective control.
As conservatives rightly point out, and anyone working in the field of sexuality research today will acknowledge, Kinsey didn't obtain a statistically representative sample of America.
The objectives of this study were to examine the prevalence of anorexia nervosa (AN), bulimia nervosa (BN), anorexia athletica (AA), and eating disorders not otherwise specified (ED-NOS) in both male and female Norwegian elite athletes and a representative sample from the general Norwegian population.
This immersion allows a representative sample to be taken.

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