A Pew Research Center survey found that social net-working is popular in many nations around the world. The file Global Social Media contains the level of social media networking (measured as the percentage of individuals polled who use social networking sites) and the GDP at purchasing power parity ( PPP ) per capita for each of 24 emerging and developing countries. (Data extracted from Pew Research Center, “Emerging Nations Embrace Internet, Mobile Technology,” bit. ly/ 1mg8Nvc.)
a. Compute the covariance.
b. Compute the coefficient of correlation.
c. Based on ( a) and ( b), what conclusions can you reach about the relationship between the GDP and social media use?