We analyse the political and economic factors of Chad, Sierra Leone and Senegal and create a linear regression model with these economic and political factors.

1. How does political and economic
factors affect life expectancy in
African Country?
Manu Gupta, David Willliams, Daniel DiNicola

2. Chad
Senegal
Sierra
Leone
These countries share the following characteristics:
1. Low government expenditure on basic services.
2. Political instability

3. BIG CONCEPT
We create a linear regression model to see which factors
affected the life expectancy the most.
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4. Factors affecting life expectancy
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● Percent of undernourished population
● Health expenditure per capita by government
● Improved access to water sources
● Improved access to sanitation
● Political instability

5. Exploratory data analysis
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6. Exploratory data analysis
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7. Exploratory data analysis
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8. Exploratory data analysis
Life expectancy is sporadic between 36 & 38
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9. Investigating further
Undernourished population % increased between 2000 & 2005
Sierra Leone was undergoing a political transition between 2000 & 20059

10. Linear regression model features
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Life.Expectancy ~ Country + War + Health.Expenditure +
I(Improved.Water.Sources*Improved.Sanitation) +
Percentage.of.People.Undernourished

11. Sanitation and water sources are highly
correlated
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● Correlation factor 0.93 for this model
● Correlation factor 0.99 for each of these countries calculated individually
Therefore, the reason for the interaction variable.

12. Results & Significance
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Life expectancy is significant at 95% confidence
interval for economic and political factors.

13. Cross validation by predicting for Sierra
Leone in 2003
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● Year : 12/31/2003
● Country = Sierra Leone
● No War
● Health Expenditure ppp (2005$) 122.3210644
● % of People Undernourished 39.9
● Improved.Water.Sources 50.4
● Improved.Sanitation 12.2
● Predicted life expectancy : 41.04602
● Standard error of the prediction : 0.20
● 95% confidence interval : [40.61077, 41.48127]
● Original life expectancy : 40.48607317
INPUT PREDICTION

14. Summary
Our regression models perform well with
95% confidence level.
The data points are yearly, more data
points might lead to better results.
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15. 15 THANKS!
Any questions?
You can find me at
▸ gmanu@umich.edu

16. CREDITS
Special thanks to all the people who
made and released these awesome
resources for free:
▸ Presentation template by
SlidesCarnival
▸ Photographs by Unsplash
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