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Recall the equation for the sum of squares S , shown below, where x, is the ith value of x and n is the total number of x measurements. 5xx = [ x 2 - ( [ x, ) n Refer to the data provided. (4, 5) (5, 8) (2, 6) (1, 5) (4, 6) (5, 7) In this exercise, we have six pairs, so n = 6 . Use this value and the x-values provided to calculate Sxx- 5 xx = [ x 2 - ( [x,)? n = (42 + 52 + ... + 52) _ (4+ 5 + ...+ 5)2 6 = 14.5 X