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From the following data, N = 11, ΣX = 117, ΣY = 260, ΣX= 1313, ΣY2 = 6580, ΣXY = 2827. The correlation coefficient is: 

(a) 0.3566 

(b) -0.3566 

(c) 0 

(d) 0.4566

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Answer is (a) 0.3566

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