Shamika conducts a study comparing the performance of individuals on the first quiz in each of two classes taken in the first term of their freshman year. the scores, out of 100, are provided for nine individuals in both classes. class 1: 87, 78, 87, 85, 93, 98, 83, 82, and 73 class 2: 87, 86, 92, 90, 90, 91, 89, 78, and 76 the sum of squares, ss, needed to complete the final calculation of the paired-samples t test, is (answer using 2 decimal places.)