This scatter plot shows an inequality index for a number of countries, versus the life expectancy at birth for each country.
The inequality index is the average of the 20:20 income inequality published in the United Nations Development Program reports for 2003, 2004, 2005, and 2006.
The higher the inequality index is, the less equal the country is considered to be
20:20 income inequality means that the index compares how much richer the top 20% of people are, compared to the bottom 20%.
Inequality can be measured using income or assets, but data on income inequality is usually much more readily available as it is collected by tax authorities.
This data was used in the popular book "The Spirit Level" which postulates that inequality is positively correlated with indicators of societal problems and negatively correlated with indicators of quality of life.
Do you think there is a significant correlation shown hear between life expectancy and inequality?
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