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234 Unit 2 Population and Migration%u00a0Patterns and%u00a0ProcessesAP %u00ae Skills Workshop1950PercentYear100203040502000 202129.8%Projections2050 2100Share of populations ages 65 and olderSouth KoreaChinaJapanUnitedWorld StatesFigure 2(a) Shares of population ages 65 and older. continuedData Analysis Defining Data Analysis The data analysis skill requires you to analyze and interpret numerical data that may be represented in tables, charts, maps, or other ways. You may need to identify and describe changes over time (e.g., growth or decline) or across space (e.g., geographic patterns) in the data, or explain the meanings of different numerical indicators and the relationships between them. Sometimes the questions may also require you to do some simple calculations based on geographic principles or theories before you can answer them. We will illustrate these skills using examples in the next section. Data analysis: With maps, tables, charts, and other graphs, you will need to analyze and interpret representations of quantitative (numerical) data. Understanding Data Analysis Below we illustrate the specific data analysis skills that students need to develop in the AP %u00ae Human Geography course. Identify and Describe Trends and%u00a0Patterns Being able to read and interpret numerical data presented in various ways is a basic but important skill. By looking at how the magnitude of a numerical indicator changes over time or from one country or region to another, you can identify and explain trends or geographical patterns in that indicator and draw meaningful conclusions. For example, Figure 2(a)depicts the changes in the share of population ages 65 and older in four countries and the world from 1950 to 2100. We can see that the share of people 65 years old and older has been increasing in all four countries and in the world as a whole, indicating the general trend of population aging, but it is projected to level off in Japan after the midpoint of this century and decrease in both China and South Korea toward the end of the century. The four countries all have a higher share of elderly people than the world as a whole. Currently, Japan is the only super-aged country (i.e., with more than 20 percent of its population ages 65 or above) but South Korea, the United States, and then China will become super-aged. South Korea %u00a9 Bedford, Freeman & Worth Publishers. For review purposes only. Do not distribute.