stratified sample vs proportional sample

stratified sample and proportional sample both are nouns.

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

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

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

Other synonyms of stratified sample include representative sample.

stratified 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