grab sample


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grab sample

In public health and medical statistics, a chaotic set of data from which conclusions are injudiciously drawn. Because the sample is not carefully randomized or scientifically selected, the conclusions derived from such sample groups may be inaccurate.
See also: sample
References in periodicals archive ?
Macrobenthos differed significantly between the two study areas for both grab sample and video data (Table 2A; Fig.
siliqua taken in grab samples, which could then be used to efficiently and cost-effectively monitor recovery in the fishery.
Answers to the following questions were sought: How meaningful are grab samples? Are ATUs consistently meeting expectations for NSF-certified, secondary wastewater treatment units?
Because grab samples were used for this evaluation, the authors would have been better served by evaluating unit performance by household, on the basis of four samples.
(Grab samples are selective in nature and should not be relied upon to represent actual grades of areas)
Venus Metals Senior Expert Exploration Advisor, Mr Barry Fehlberg collected surface grab samples from four of the more gossanous boudins during the field inspection of the Tenement in July 2011.
No Dice Chicun Zn-Pb - strong soil anomalism over 1km with limited highgrade grab sample results including Pb to 34%, Ag to 88 g/t and Zn to 1.4%
Commented Michael Stares, Interim President and CEO of White Metal, "We are very excited with initial grab sample results from the Startrek property.
At the northwest end of the zone a grab sample of dump material beside an inclined shaft returned 14.87 g/t gold.
Grab sample results from two sample batches totalling 141 samples from Highway Zones at Shot Rock have been received.