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Calculate the coefficient of correlation between x & y from the following data.
x 23 27 28 29 30 31 33 35 36 39
y 18 22 23 24 25 26 28 29 30 32

1 Answer
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Let us assume ˉX = 30 & ˉY= 25

Given N=10

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r= dxdy(dx)(dy)N(dx2(dx)2N)(dy2(dy)2N)

r= 186(11×710)(215(11)210)(163(7)210)

r= 1867.721512.11634.9

r= 178.3202.9158.1

r= 0.9948

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