The data in the next column represent the maximum wind speed (in knots) and atmospheric pressure (in millibars) for a random sample of hurricanes that originated in the Atlantic Ocean.

(a) Draw a scatter diagram treating atmospheric pressure as the explanatory variable.
(b) Compute the linear correlation coefficient between atmospheric pressure and wind speed.
(c) Does a linear relation exist between atmospheric pressure and wind speed?

Wind Speed Wind Speed Atmospheric Pressure (mb) (knots) Atmospheric Pressure (mb) (knots) 993 50 1006 40 995 942 120 60 994 1002 40 997 45 986 50 1003 45 983 70 65 1004 40 994 1000 55 940 120 994 55 976 80 942 105 966 100 1006 30 982 55