The Median Age of 1950-2050 (an animated interactive map)

Data: 
TXT, HTM, XLS, PULT, 1200x900, 800x600
Pult: 
Screenshots: 

The Median Age of 1950-2050 (an animated interactive map),
HTML-code of screenshot:
<a href="http://www.datapult.info/en/content/median-age-1950-2050-animated-interactive-map"/>
<img src="http://www.datapult.info/en/dataset/u000052/4D85128609A42DC8.300x0.en.png"
     alt="The Median Age of 1950-2050 (an animated interactive map), "/>
</a>

What is the formula for median age?

After you order the n individual ages from youngest to oldest you can find the location of the median with the formula M=(n+1)/2.

For example, if you have an odd number of ages such as 7, 23, 35, 53, 99 then the median will be the (n+1)/2=(5+1)/2=3rd observation of the ordered set. Hence the median age is 35 years. Exactly half the ages are less than 35 and exactly half the ages are more than 35.

If, on the other hand, you have an even number of ages such as 7, 23, 35, 53, 75, 99 then the location of the median will be at position (n+1)/2=(6+1)/2=3.5 of the ordered set. Since there is no "three and halfth" observation you need to take the average of the 3rd and 4th observation. Hence the median age is (35+53)/2=44 years.

easy way out middle age is the median age

Read more: http://wiki.answers.com/Q/What_is_the_formula_for_median_age#ixzz1H51znXCj


Source Gapminder "indicator_median_age".

Indicators: 
Median age
Years: 
1950; 1955; 1960; 1965; 1970; 1975; 1980; 1985; 1990; 1995; 2000; 2005; 2010; 2015; 2020; 2025; 2030; 2035; 2040; 2045; 2050
Regions: 
Afghanistan; AFRICA; Albania; Algeria; Angola; Argentina; Armenia; Aruba; ASIA; Australia; Austria; Azerbaijan; Bahamas (the); Bahrain; Bangladesh; Barbados; Belarus; Belgium; Belize; Benin; Bhutan; Bolivia; Bosnia; Botswana; Brazil; Brunei; Bulgaria; Burkina Faso; Burundi; Cambodia; Cameroon; Canada; Cape Verde; Caribbean; Central African Republic; Central America; Chad; Channel Islands; Chile; China; Colombia; Comoros; Congo; Congo, The Democratic Republic Of; Costa Rica; Cote D'ivoire; Croatia; Cuba; Cyprus; Czech Republic (the); Denmark; Djibouti; Dominican Rep; Eastern Africa; Eastern Asia; Eastern Europe; Ecuador; Egypt, Arab Rep.; El Salvador; Equatorial Guinea; Eritrea; Estonia; Ethiopia; EU; Fiji; Finland; France; French Guiana; French Polynesia; Gabon; Gambia (the); Georgia; Germany; Ghana; Greece; Grenada; Guadeloupe; Guam; Guatemala; Guinea; Guinea-bissau; Guyana; Haiti; Holland; Honduras; Hong Kong; Hungary; Iceland; India; Indonesia; Iran; Iraq; Ireland; Israel; Italy; Jamaica; Japan; Jordan; Kazakhstan; Kenya; Korea, Democratic People's Republic Of; Korea, Rep; Kuwait; Kyrgezigstan; Laos; LATIN AMERICA AND THE CARIBBEAN; Latvia; Least developed countries; Lebanon; Lesotho; Less developed regions; Less developed regions, excluding China; Less developed regions, excluding least developed countries; Liberia; Libya; Lithuania; Luxembourg; Macao; Macedonia; Madagascar; Malawi; Malaysia; Maldives; Mali; Malta; Martinique; Mauritania; Mauritius; Mayotte; Melanesia; Mexico; Micronesia; Middle Africa; Moldavia; Mongolia; Montenegro; More developed regions; Morocco; Mozambique; Myanmar; Namibia; Nepal; Netherlands Antilles; New Caledonia; New Guinea; New Zealand; Nicaragua; Niger; Nigeria; Northern Africa; NORTHERN AMERICA; Northern Europe; Norway; OCEANIA; Oman; Pakistan; Palestina; Panama; Paraguay; Peru; Philippines; Poland; Polynesia; Portugal; Puerto Rico; Qatar; Reunion; Romania; Russia; Rwanda; Samoa; San Tome And Principe; Saudi Arabia; Senegal; Serbia; Sierra Leone; Singapore; Slovakia; Slovenia; Solomon Is.; Somaliland; South Africa; South America; South-Central Asia; South-Eastern Asia; Southern Africa; Southern Europe; Spain; Sri Lanka; St. Lucia; St. Vincent & Grenadines; Sub- Saharan Africa; Sudan; Surinam; Swaziland; Sweden; Switzerland; Syria; Tajikistan; Tanzania; Thailand; Tmp; Togo; Tonga; Trinidad &tobago; Tunisia; Turkey; Turkmenistan; Uganda; Ukraine; United Arab Emirates; United Kingdom; United States; United States Virgin Islands; Uruguay; Uzbekistan; Vanuatu; Venezuela; Vietnam; Western Africa; Western Asia; Western Europe; Western Sahara; WORLD; Yemen; Zambia; Zimbabwe