Representative sample and Sample distribution

Representative sample noun - The population is divided into strata and a random sample is taken from each stratum.

Sample distribution and representative sample are semantically related. In some cases you can use "Sample distribution" instead a noun phrase "Representative sample".

Sample distribution noun - Items selected at random from a population and used to test hypotheses about the population.

Representative sample and sample distribution are semantically related. Sometimes you can replace phrase "Representative sample" with "Sample distribution", this phrases are similar.