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Find the coefficient of correlation for the following:

X 78 89 96 69 59 79 68 62
Y 121 72 88 60 81 87 123 92

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N = 8, ΣX = 600, ΣY = 724, Σdx2 = 1172, Σdy2 = 3372, Σdxdy = -146

Correlation coefficient

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