Example : The study of statistics such as births, deaths, income, or the incidence of disease, which illustrate the changing structure of human populations. The problems of food, housing, unemployment, poor health, poverty, low standard of living etc., are problems as well as direct outcomes of changing demography.
Demography is a statistical study of human population. Demography encompasses the study of the size, structure and distribution of the population. It records spatial and temporal changes in population in response to birth, migration, aging and death. The composition of a particular human population is demography.