I believe that in America most immigrants do not have to assimilate into society, which is the main reason they come here.
they often do not represent an accurate cross section of the total population.
A segment of a population targeted for study can be called a focus group. This is a small number of people that represent what you are wanting to learn more about.
People over the age of 80 are the fastest growing segment of the population. This is expected to be true for the next four decades.
Elderly
Hispanics.
The affluent
Baby Boomers
Hispanics
organized labor
Small game hunters
they reflect a narroe segment of the population
property owners