He added: "In a scientific poll, the pollster selects the sample and tries to get a demographically representative group to respond.

The OFLC also regularly convenes panels that are demographically representative of New Zealand as a whole to assist it with the classification of particular publications.

Grade level is usually arrived at by giving a reading test to a demographically representative sample of third graders.

This citizens' panel is chosen to be demographically representative of the public.

The data was weighted to be demographically representative.

The respondents were chosen at random and were a demographically representative sample of the full class.

The survey was conducted on a demographically representative survey of 1,200 U.S. adults between 18 and 29 years old.

The sample groups were also exclusively African-American and therefore not demographically representative of the entire population.

At the same time, George Gallup conducted a far smaller, but more scientifically based survey, in which he polled a demographically representative sample.

The information was collected from 2,000 demographically representative households whose members filled out diaries of what they ate for a two-week period.