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E Xj - X yi 1 - 5.4 20 - 12 3 - 5.4 18 - 12 = + Sy 3.911 6.78 3.911 6.78 Sx

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E Xj - X\\ yi 1 - 5.4 20 - 12 3 - 5.4 18 - 12 = + Sy 3.911 6.78 3.911 6.78 Sx 4- 5.4 10 - 12 9 - 5.4 8 - 12 10 - 5.4\\ 4- 12) + + 3.911 6.78 3.911 6.78 3.911 6.78 = - 3.6958

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