14.22 Global warming. Exercise 14.18 gives data on the average global temperatures, in degrees Celsius, for the years 1994 to 2014.
(a) Use a calculator to find the correlation r. Explain from looking at the scatterplot why this value of r is reasonable.
(b) Suppose that the temperatures had been recorded in degrees Fahrenheit. For example, the 1994 temperature of 14.23°C would be 57.61°F. How would the value of change?