A sample which accurately reflects a specific condition or set of conditions within the universe.
research subjects with essentially the same distribution of analytically relevant characteristics as the population/group/segment from which it was drawn. The representativeness enables the analysis to give a reasonably accurate portrayal of the research subject's characteristics and known diversity.
A sample that consists of a number of units that are drawn based on rational criteria such as random sampling and intended to assure that the sample accurately portrays the material being sampled. [From §210.3(b)(21)
People chosen because they can stand for a larger group, so that the researcher can link the findings about the sample to the larger group.
A representative sample is one which has been selected in such a way that, as far as can be ascertained, the main characteristics of the sample match those of the parent population; i.e. the population from which the sample has been drawn.
a group selected for polling in which everyone in a population had an equal chance of being selected.
a collection of objects that includes all parts of the population of the objects in their proper proportions; an unbiased sample that gives accurate results.
the population is divided into strata and a random sample is taken from each stratum
a sample in which the characteristics of the lot from which it is drawn are maintained
a sample of a population that reflects that characteristics of the parent population
a small part of a population that is assumed to be typical of the whole population
A sample that accurately reflects the characteristics of the population from which it is drawn.
A sample of material that has been taken so that it has essentially the same composition and characteristics of the source material.
A sample whose characteristics correspond to those of the original population or reference population.
A sample that closely approximates both the concentration of activity and the physical and chemical properties of material (e.g., particle size and solubility in case of air sampling of the aerosol to which workers may be exposed).
a sample in which each unit has a known probability of selection that is accounted for either through sampling or weighting. A representative sample is obtained using probability, or random sampling.
A sample (e.g., groundwater, waste) that can be expected to exhibit the average properties of the whole.
means a sample that consists of a number of units that are drawn based on rational criteria, such as random sampling, and intended to ensure that the sample accurately portrays the material being sampled. [Definition from Proposed Rule: Current Good Manufacturing Practice in Manufacturing, Packing, or Holding Dietary Ingredients and Dietary Supplements; 68 FR 12251
sample in which the participants closely match the characteristics of the population, and thus, all segments of the population are represented in the sample. A representative sample allows results to be generalized from the sample to the population.
A sample of product or service that possesses all the characteristics of the batch from which it was taken
A sample that has approximately the same distribution of characteristics as the population from which it was drawn.
a sample that retains the chemical and physical character of the in-place ground water
A sample of participants that is representative of the population on a number of attributes.
A phrase used to suggest that the sample has been selected in a manner which permits projection of results from the sample to the universe from which it was drawn.
1. A portion of water or material that is, as nearly as possible, identical in content and consistency to that in the larger body of water or material being sampled.
A portion of material or water that is as nearly identical in content and consistency as possible to that in the larger body of material or water being sampled.
A selection from a larger population that has the essential characteristics of the total population.