Unlike the man in overalls, Simon prefers not to approach strangers while in Starbucks ("It's a biased sample"), so, to pass the time, he often counts customers.
If you're an undergrad, then most of the grad students you know are hopeful about their careers, and all of the professors you know are successful; it's a biased sample.
This could be a biased sample of the unknown population of studies that could be reviewed, but it is highly unlikely to be biased in a way that distorts a comparison to crime.
As pointed out by Borenstein et al. [[7], p. 378], "... if these studies are a biased sample of all possible studies, then the mean effect reported by a meta-analysis will reflect this bias".
Crowdsourced fitness data are a biased sample of ridership, however, in urban areas the high temporal and spatial resolution of data can predict categories of ridership and map spatial variation.
Thus, it is possible that patients who participate in fMRI studies may be a biased sample of schizophrenia patients due to stringent exclusion criteria.
To assess whether these were a biased sample of all possible species with respect to aspects of species biology, we compared the median adult body mass (from data collated by Dunning [19]) and median breeding range latitudinal midpoint (from data collected by Orme et al. [20]) of the 251 species, with the distribution of 1000 medians for 251 randomly chosen species.
This often means that the sample selected for analysis is a biased sample from the underlying populations.
This introduced possible response bias, i.e., the respondents were a biased sample of all indirectly affected eligible participants.
This dataset is also likely to be a biased sample of interactions, as it comes from focussed studies targeting select proteins.
