they allow researchers to know how closely the sample resembles the target population. ... As such, researchers know the percentages of the population based on race, gender, age, education, and a whole host of other demographic characteristics.
Demographic measures typically are used to identify key respondent characteristics that might influence opinion and/or are correlated with behaviors and experiences. ... Demographic measures are also very important because they allow researchers to know how closely the sample resembles the target population.....
