Question

For the given data, n=20, X̅ = 40, Y̅ = 60, ∑(X-10)2 = 100, ∑(Y-30)2 =160 and     ∑(X-10)*(Y-30) = 80. Calculate the regression coefficient of Y on X

A 1.45
B 1.21
C 0.80
D 1.00
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