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Selection bias arises when researchers use a sample that is not truly representative of the whole population.
For this purpose, we use a sample that consists of 1 μm fluorescent beads laid on a glass substrate.
If you use a sample that is big enough, or has gotten used and caused a lawsuit, you are doing so on your own back.
Third, we use a sample that spans working-age individuals with a range of disabilities who have demonstrated a particular interest in employment by applying for VR services.
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None of those accusations can be used to criticise this new study, Professor Lewandowsky says, because the questionnaire was carried out by a third-party professional survey company using a sample that was representative of the US population.
The study, published last week in The Journal of Adolescent Health, used a sample that fell below national averages for calcium intake and physical activity, so the results may not be generalizable to wider populations.
They used a sample that included 212 Moroccan youths who had immigrated with their families to either France or Israel.
Detection of HMA-specific NOEs was made possible by using a sample that contains (15N, 2H -labeled p7 (5a) and deuterated or "NMR invisible" DPC.
To isolate unique effects of musical training and bilingualism, the current study used a sample that was homogenous in educational background and geographical location; and we tested for differences in possible third factors that are known to impact cognitive performance.
It used a sample that was selected from YouGov's opt-in online panel to match the demographics and other characteristics of the adult U.S. population.
Our longitudinal HIV incidence estimates in this article are slightly lower than previously published estimates from the same community [20], because the current study uses a sample that is different from the one used previously.
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