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Related to random sample: stratified random sample
a selection on the basis of chance of individuals or items in a population for research; selection is made in such a way that all members presumably have the same chance of being selected.
Farlex Partner Medical Dictionary © Farlex 2012
random sampleA population sample selected by a randomisation method designed to ensure that each subject or patient in a target group has an equal chance of being selected for the treatment arm of the study.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.
random sampleStatistics A population sample derived by selecting individuals, such that each has the same probability of selection; a group of subjects selected in such a way that each member of the population from which the sample is derived has an equal or known chance–probability–of being chosen for the sample. See Sampling.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.
ran·dom sam·ple(randŏm sampĕl)
Selection on basis of chance of individuals or items in a population for research.
Medical Dictionary for the Dental Professions © Farlex 2012