The phrase "a representative random" is not correct in written English.
It seems to be an incomplete or incorrect combination of terms that may refer to a "representative sample" or "random sample."
Example: "In our study, we aimed to collect a representative random sample of participants to ensure accurate results."
Alternatives: "a representative sample" or "a random sample."
A representative random sample of 100 successful traversings were drawn from the population and analyzed against the crashes.
The methodology includes an instrumental design, with a representative, random sample of secondary school teachers in the province of Ñuble, Chile.
By contrast, a representative random removal showed minimal change in the shape of the embedding.
In this study, a representative random sample of two-adult households living in Sweden during 2007 is used.
For this year's report, NatCen interviewed a representative, random sample of 2,878 adults in the UK between August and November 2014.
However, given that the Labor Force Survey is a representative random sample of the Dutch workers, the final dataset remains broadly representative of Dutch firms (with 10 or more employees).
Due to the large number of patients in the control group, a representative-random sample of 150 patients was generated by the statistician (ER).
A nationally representative, random sample of 831 housing units was evaluated in a survey between 1998 and 2000; the units and their occupants did not differ significantly from nationwide characteristics.
A major strength of the study is that the data come from a nationally representative random sample of care facilities for PLWD.
NHANES is a nationally representative random sample of the non-institutionalized U.S. civilian population selected using a complex multistage probability sampling design.
Prescription data constitute a nationally representative random sample of pharmacies (stratified by type, size and region) and capture approximately 70% of all prescriptions filled in the US.
