Solve the following:
Q: In an effort to determine whether any correlation exists between the price of stocks of airlines, an analyst sampled six days of activity of the stock market. Using the following prices of Delta stock and South-west stock, compute the coefficient of correlation. Stock prices have been rounded off to the nearest tenth for ease of computation.
Delta South-west
47.6 15.1
46.3 15.4
50.6 15.9
52.6 15.6
52.4 16.4
52.7 18.1