X Y X - X’ Y - Y’ (X - X’)2 (Y - Y’)2 (X - X’) (Y - Y’)
2005 60 -4. 5 -13 .6 20.25 184.96 61.2
2006 65 -3. 5 -8. 6 12.25 73.96 30.1
2007 74 -2. 5 0.4 6.25 0.16 -1
2008 90 -1. 5 16.4 2.25 268.96 -24 .6
2009 69 -0. 5 -4. 6 0.25 21.16 2.3
2010 60 0.5 -13 .6 0.25 184.96 -6. 8
2011 90 1.5 16.4 2.25 268.96 24.6
2012 60 2.5 -13 .6 6.25 184.96 -34
2013 73 3.5 -0. 6 12.25 0.36 -2.1
2014 95 4.5 21.4 20.25 457.96 96.3
20095 736 82.5 1646.4 146
Sxy = 14.6 Sx = 2.87 Sy = 12.8 3
r = Sxy = 14.6. = 14.6 = 0.40
Sx Sy (2.87) (12.83) 36.82
r2 = 0.40!= 0.1572 = 15.72%
