representative sample vs proportional sample

representative sample and proportional sample both are nouns.

Word	Noun	Adjective	Verb	Adverb
representative sample	Yes	No	No	No
proportional sample	Yes	No	No	No

As nouns, representative sample and proportional sample are synonyms defined as:

representative sample and proportional sample: the population is divided into strata and a random sample is taken from each stratum

Other synonyms of representative sample include stratified sample.

representative sample (noun)	proportional sample (noun)
the population is divided into strata and a random sample is taken from each stratum	the population is divided into strata and a random sample is taken from each stratum