Diagram Age Pdf For Free

There are usually three types of age pyramids - The expansive age pyramid, stationary age pyramid, and constructive age pyramid. And all three pyramids are of different shapes. These pyramids also have various uses such as telling us about the mortality and fertility rates of any given area.

The three types of population pyramids are expansive, constrictive, and stationary. The five stages of population pyramids are high fluctuating, early expanding, late expanding, low fluctuating, and natural decrease.

One of the tools that demographers use to understand population is the age structure diagram (it is sometimes called a population pyramid, but it is not always pyramidal in shape). This diagram shows the distribution by ages of females and males within a certain population in graphic form.

They are: Finite Population. Infinite Population. Existent Population. Hypothetical Population.

The different age-structure diagrams are represented by different shapes. Four general types are the pyramid, column, an inverted pyramid (top-heavy), and a column with a bulge.

The characteristics of marriage status, birth rate, death rate, migration, education level, ethnic groups, and economy differ significantly in different age groups. The investigation into age structure/distribution is important in identifying potential school age population, labour force, army, elector, etc.

Horizontal bars extending to the left at each age range indicate the number of males, while bars extending to the right indicate the number of females. To find the total number of males or females in a population, add all the bars on each side. It will decline over time.

An age-structure diagram provides a snapshot of the current population and can represent information about the past and give potential clues about future problems. When you are interpreting age-structure diagrams, it is important to compare the width of the base to the rest of the population.

Constructing and Interpreting an Age Structure Diagram If the diagram shows a generally straight up and down shape except for the older age groups, a stable population is thus revealed. If the diagram shows a top-heavy shape, then a decline is forecast for that population.

A population's growth rate is strongly influenced by the proportions of individuals of particular ages. With knowledge of this age structure, population growth can be more accurately predicted. Age structure data allow the rate of growth (or decline) to be associated with a population's level of economic development.