The word age comes from the Latin word "aetas", which means "age" or "said of various subjects who are the same age." The word age is the one that refers to age by the time that elapses from the beginning of birth and present period that is calculated in years, from the beginning of the first 12 months of life.
This classification is applied to a set of subjects, which are also based on age as a differentiating character in which age groups are named, but they are those that interpret people who are the same age. In these cases, many times it is talked about an age group that includes not only the same age but similar ages, they can be like the age of adolescence that includes the ages between 12 and 18 years or when they are young that starts from 2 up to 5 years of age who are in pre-school age.
People who share the same age or live in a certain common transcendental period, are said to be contemporaries, because they also share the condition of being the same age or coincide in the same period, because they are one of the variables Modular statistics and not direct because they are used for scientific studies.
Each age group is made up of a social class, which has different expectations at a sociological level, for example, the age group is interpreted between the ages of 6 and 18 who pass through educational units in order to be fully trained.
