: a loose pullover or jacket without a collar and usually with long sleeves. See words that rhyme with sweatshirt Spanish Central: Translation of sweatshirt Nglish: Translation of sweatshirt for Spanish speakers.
Demography (from prefix demo- from Ancient Greek Î´á¿Î¼Î¿Ï dÄmos meaning the people, and -graphy from Î³ÏÎ¬ÏÏ graphÅ, implies writing, description or measurement) is the statistical study of populations, especially human beings.
Demography is the study of these changes. Ecologists use demographic analysis to predict the growth of a population. Birth rate, death rate, immigration and emigration can be used to determine the growth rate of the population in a given period of time. This data can also be used to develop plans to protect endangered species. Survivorship Curves