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Dear Student
As here Mean is not a whole number thats why we adopt Assumed Mean method.
Regards
X | dx = X - A | (dx)2 | Y | dy = Y - A | (dy)2 | dxdy |
---|---|---|---|---|---|---|
5 | -15 | 225 | 2 | -5 | 25 | 75 |
10 | -10 | 100 | 3 | -4 | 16 | 40 |
15 | -5 | 25 | 4 | -3 | 9 | 15 |
20 - A | 0 | 0 | 4 | -3 | 9 | 0 |
25 | 5 | 25 | 9 | 2 | 4 | 10 |
15 | -5 | 25 | 12 | 5 | 25 | 25 |
30 | 10 | 100 | 7 - A | 0 | 0 | 0 |
35 | 15 | 225 | 11 | 4 | 16 | 60 |
c = 155 N = 8 Mean = 19.37 | Σdx = -5 | Σdx2 = 725 | ΣY = 52 N = 8 Mean = 6.5 | Σdy = -4 | Σdy2 = 104 | Σdxdy =225 |
As here Mean is not a whole number thats why we adopt Assumed Mean method.
Regards