Different countries sell a variety of drugs at different prices. For each of the 10 popular prescription drugs, the file contains a list of the retail price (US$) for the drug in different countries....

Different countries sell a variety of drugs at different prices. For each of the

10 popular prescription drugs, the file contains a list of the retail price (US$) for

the drug in different countries. Use the data in
 to calculate the answers to the problem.

(a) Compute the correlation coefficient for these sample data.