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biased sample

   Also found in: Encyclopedia, Wikipedia 0.03 sec.
biased sample
[bī′əst]
Etymology: OFr, biais, slant; L, exemplum, sample
(in research) a sample of a group in which all factors or participants are not equally balanced or objectively represented.


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Unfortunately 127 participants were excluded and, therefore, results were based on a potentially biased sample.
Their concern about a biased sample selection is equally unfounded.
Given the taxonomically and physiologically biased sample of studies of drought adapation strategies among pteridophytes, the aim of the present study was to assess the variability of drought stress strategies among pteridophytes by experimentally desiccating and rehydrating excised leaves (leafy stem sections in the case of Selaginella) from 43 pteridophytes belonging to a wide range of taxonomic groups and morphological types.
 
 
 
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