List and define at least 4 different statistics demographers use to study population.

1. Crude Birth Rate - the annual number of resident live births for a specified area during specified period.2.General Fertility Rate - the annual number of live births per 1,000 women of reproductive ages.3. Crude Death Rate - the total number of deaths occurring per mid-year total population of the given area during the same year.4. Mortality Rate - the number of deaths in a particular population, scaled to the size of that population, per unit of time.

The central idea is that the hiv/aids epidemic is serious.