"a substantial sample" is a correct and usable phrase in written English.
You can use it when you are referring to a large or significant amount of something, especially in the context of research or evidence. For example: "The team took a substantial sample of the population to ensure the accuracy of their results."
A substantial sample of upper and lower canines (and lower third premolars) showed that the upper canines of Ardipithecus did not sharpen (hone) as did those of all fossil and modern apes.
"By carrying out detailed scientific tests on a substantial sample of medieval lightweight portable bibles, we have effectively turned what had been regarded as purely art historical objects into new archaeological data," said the director of the research project, Professor Matthew Collins.
Very few articles are available in literature that present failure analysis based on a substantial sample size of real die breakdowns.
Data collection ceased when a substantial sample size [ 50] produced clear, supportable claims.
This necessitates processing of a substantial sample volume through the affinity substrate.
We performed this renormalization five times to achieve a substantial sample (the results are shown in Additional file 2).
The dataset used, which comprises 515 alleles found in more than 831 isolates spanning a great taxonomical host range, reflects a substantial sampling diversity of WSP and allowed grouping of recently diverged WSP proteins and HVR motifs.
During our generalization tests, there was a rather substantial sample of subjects that did not receive the visual display component but nonetheless showed high task compliance.
Overall, BioBin can be used as a filtering mechanism to group data and evaluate rare variant burdens between two groups, but requires a more substantial sample size to gain power to detect significance.
Although this enabled access to a more diverse and substantial sample that could otherwise be reached, it also raises issues about the integrity of the data.
Previously, CEP was a laborious process requiring substantial sample volumes when multiple cytokines were under investigation.
