Economics The HDI summarizes the progress in health, education and economics of a country with a number. GDPPC tries to summarize, wealth produced by a country in a single number. We have data for 172 countries. IMPORTANT: use R for all calculations and R Markdown to write all the solutions.

 i - Build a cloud of points from the GDPPC (y) against the HDI (x) and superimpose a smooth curve. 

ii - should we use pearson's or spearman's correlation to write the intensity link between the GDPPC and the HDI ? Why ?

iii - Describe the association between the GDPPC and the HDI. (Include the correlation in the description) Here are the data: Country, HDI (x) , GDPPC (y) Norway : 0.965, 38454 Iceland : 0.96, 33051