


Population Dynamics
Procedure
Part I: Provide a thumbnail sketch of population data.
 Complete the following chart by adding data for the United States.
 Madagascar  United States 
Age Structure (1999 est.)
014 years
1564 years
65 years and over

7,600,000
7,700,000
490,000


Population growth rate

2.8 % 

Infant Mortality Rate

89.1 deaths/1,000 live births 

Life expectancy

male 52.0 years
female 54.5 years 

Part II: Calculate percentages of age structure in the two
populations.
 To complete the chart below you must calculate percentages. To calculate a
population percentage, divide the number of people in a given age bracket by
the total number of people in the population and multiply this ratio by a
hundred. The total number of people when you add up the numbers in Part I is
15,790,000. For example, in Madagascar for the 014 age group the percentage is
given by :
7,600,000 x 100 = 48%
15,790,000
 Madagascar  United States 
Age Structure (1999 est.)
014 years
1564 years
65 years and over

48%


Part III: Create pie and bar graphs.
 Present the percentage data in Part II in piechart and in bargraph form
using the graph paper, compass, ruler, and colored pencils. Make two pie
charts: one representing the age distribution in Madagascar and one
representing the U.S. population. Each chart should have a title and the
percentage numbers written in the pie wedges. Represent the data in bargraph
form using red and blue pen to distinguish the two countries.
 If you were to present this data to an audience which graph type would you
choose and why?
Part IV: Consider implications of the above information.
 As you look at the above information, what are some of the major differences
you see in population dynamics between the United States and Madagascar?
 In terms of the population dynamics, what are some of the major challenges
each country faces?
 What government policies would you recommend that each country adopt to
alleviate some of the problems caused by that country's age population
distribution? Describe the policy and how it would help. Be sure to include
cost considerations as you decide on your recommendations.
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