The phrase "a haphazard sample" is correct and usable in written English.
It can be used to describe a sample that has been collected or selected in a random or careless manner, without a systematic approach.
Example: "The researchers analyzed a haphazard sample of responses from the survey, which may affect the reliability of their findings."
Alternatives: "a random sample" or "an arbitrary sample".
It encompasses word of mouth, hopeful guessing through past experiences with a given brand and wild speculation based on a haphazard sampling of the copious Internet reviews at various Web sites.
Most analyses to date have been based on haphazard sampling of fields and seed stocks in a restricted number of localities; results are not representative of a well-defined population.
We found that genes selected via their informativeness dramatically outperformed haphazard sampling of markers.
For all data sets with the exception of DNA OrthoMaM, these rankings performed better than haphazard sampling.
DPI rankings provided close to the optimal experimental design path (i.e., sampling the genes from the highest to the lowest average PLRS, which would represent the ideal situation when deciding about sampling genes for sequencing) for all amino acid data sets, outperforming haphazard sampling, especially for FUNYBASE and simulated amino acid data.
A deluge of whole-genome sequencing has begun to give insights into the patterns and processes of microbial evolution, but genome sequences have accrued in a haphazard manner, with biased sampling of natural variation that is driven largely by medical and epidemiological priorities.
October 8 2014 October 19 201414 In its eleventh year, City Center's bargain sampler maintains a haphazard quality.
First, the inclusion of confirmed EVD patients whose samples were sent to CMLTT for Ebola virus testing was subject to selection bias because the samples collected from PUIs were delivered to laboratories in a haphazard manner.
Johnson is a haphazard sort of libertarian.
They worked in a haphazard fashion.
