The phrase "a significant sample of" is correct and usable in written English.
It can be used when referring to a portion of a larger group that is large enough to provide meaningful insights or conclusions.
Example: "The study analyzed a significant sample of participants to ensure the results were representative of the larger population."
Alternatives: "a substantial portion of" or "an important subset of".
Back in town the rabbi introduced me to more lively links: a significant sample of Canakkale's 35 Jews.
We have created maps containing as many as 518 million of these hyperlinks, a significant sample of the total.
Palaeontological sites can be a significant sample of the palaeocommunity to which they belonged, or represent effects of animal consumption.
A Guardian investigation found that the superbug MRSA was found in a significant sample of pork products on the UK's supermarket shelves, risking humans becoming infected with the strain.
We survey and discuss the degree of representativeness of experimental settings used in a significant sample of current research and we propose some strategies to overcome the emerging limitations.
A quantitative method was chosen, thus comprising a significant sample of evaluated questionnaires.
Organized by a guest curator, Michael Fitzgerald, who is a leading Picasso expert, this one will assess the impact of Picasso's work on nine American artists and, to make its points, will include a significant sampling of Picassos.
Because of the nature of their work, Balmond and his Arup colleagues have been able to achieve something professionally that no single architect, however distinguished, could ever come close to: they have helped design a significant sampling of the greatest buildings of their time.
The buildings of the University, located mainly in three zones of the town, constitute a significant sampling of the different architecture typologies coexisting in the area, including examples of traditional masonry buildings together with modern constructions of architectural value.
Our choice of species represents a significant sampling of metazoan diversity, as we include representatives of the main metazoan evolutionary lineages.
Many hcn scaffolds probably were not captured by the mapping exercise to the two reference genomes but the recovery of approximately 1,500 hcn repeats in both libraries indicates a significant sampling of the repeat repertory.
