Table : TABLE 16-4. The Denominator of the Correlation Coefficient The Calculations for Sums of Squares
Absences (X)(X − MX)(X − MX)2Exam Grade (Y)(Y − MY)(Y − MY)2
4  0.6    0.3682    6  36
2−1.4    1.9698  22484
2−1.4    1.9676    0    0
3−0.4    0.1668  −8  64
1−2.4    5.7684    8  64
0−3.4  11.5699  23529
4  0.6    0.3667  −9  81
8  4.6  21.1658−18324
7  3.6  12.9650−26676
3−0.4    0.1678    2    4
∑(X − MX)2 = 56.4                ∑ (Y − MY)2 = 2262