# Closed population-a population whose increase is only a through birth and decrease is caused only by death.

DEFINATION OF TERMS
Closed population-a population whose increase is only a through birth and decrease is caused only by death.
Demography-is the statistical study of human population with respect to its size, birth, marriage and death characteristics.
Enumeration-is the collection of data in an orderly and complete manner.
Force of mortality- is the instantaneous rate of mortality at a given age given on an annual basis
Life tables-is a table which shows the probability that a person at a given age will die before reaching his or her next birthday.
Likelyhood estimate-
Model-is an advanced mathematical expression of one or more variables (function), with an error term
Mortality rate-is a measure of the number of deaths within a given time as
Parameters- is a value used to represent a given population characteristic. It is usually unknown and which has to be estimated..
Stable population-is a population whose total size varies by a constant growth rate.
Stationery population- is a population whose age composition never changes and the total size remains constant as the number of deaths is exactly matched by the number of births.
Survivor ratio-