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subsample

   Also found in: Dictionary/thesaurus, Wikipedia 0.01 sec.
subsample [‚səb′sam·pəl]
(analytical chemistry)
A portion taken from a sample of material for which a chemical analysis has been specified.


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We create a subsample of stocks that do not have tradable options, following the intuition of Chen and Singal (2003), who suggest that stocks with options are likely to have less speculative short selling.
In a study subsample, adjustment for the confounding effects of assay differences changed mean serum 25(OH)D concentrations by approximately 10 nmol/L, and adjustment for changes in factors likely related to real changes in vitamin D status (body mass index, milk intake, and sun protection) changed mean serum 25(OH)D concentrations by 1-1.
This Australian/Dutch study looked at the association between serum concentrations of antioxidant nutrients and incidence (person based and tumor based) of basal cell carcinoma (BCC) and squamous cell carcinoma (SCC) of the skin among a random subsample of 485 adults from an Australian community.
 
 
 
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