a person who represents others

an advocate who represents someone else's policy or purpose

a member of the United States House of Representatives

an item of information that is typical of a class or group

serving to represent or typify

standing for something else

being or characteristic of government by representation in which citizens exercise power through elected officers and representatives

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

the population is divided into subpopulations (strata) and random samples are taken of each stratum