In this section, we explore the distribution of life expectancy across different countries and the various factors that contribute to life expectancy. We use a variety of visualizations, including histogram, heatmap, timeline, and stacked bar chart, to help you understand the trends and patterns in life expectancy across the world.
This chart displays the distribution of life expectancies across different countries. The chart helps to identify the range of values that exist and see how many countries fall into each range.
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This chart displays a correlation matrix of various factors that impact life expectancy.
The chart gives an intuition to see which factors are positively (or negatively) correlated with life expectancy, and stronger
colors suggest a stronger positive correlation.
In mathematics the correlation of two statistical variables is calculated as
the covariance between the two variables divided by the product of their standard deviations.
The correlation ranges from -1 to +1, if the correlation is near to zero the variables are considered uncorrelated. Meanwhile a value near to
1 indicates a positive correlation so when the first variable grows, the second one grows too;
Analogously a correlation near to -1 indicates a negative correlation so when a variable grows the second
one decreases. The diagonal of a covariance matrix contains values equal to one because on the diagonal the correlation
of a variable is calculated with itself.
The timeline chart is like a time machine, taking us on a journey through the history of life expectancy and adult mortality across the world. We can see how life expectancy has improved in different countries over time. If no countries are selected, data of all the countries are displayed hovering it.
Infant deaths are considered an issue of developing countries of a third world where infants do not live in hygenic ambients and do not have access to medical assistance. Still recent human development has managed to reduce infant deaths all over the world and postpone the life expectancy. The following chart displays for maximum 5 countries the ranges of age when deaths occur.
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