# Find the coefficient of correlation for the following: Cost (Rs) 14 19 24 21 26 22 15 20 19 Sales (Rs) 31 36 48 37 50 45 33 41 39

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Find the coefficient of correlation for the following:

 Cost (Rs) 14 19 24 21 26 22 15 20 19 Sales (Rs) 31 36 48 37 50 45 33 41 39

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 X Y x= X - $\bar{X}$ = X - 20 y = Y - $\bar{Y}$ = Y - 40 x2 y2 xy 14 31 -6 -9 36 81 54 19 36 -1 -4 1 16 4 24 48 4 8 16 64 32 21 37 1 -3 1 9 -3 26 50 6 10 36 100 60 22 45 2 5 4 25 10 15 33 -5 -7 25 49 35 20 41 0 1 0 1 0 19 39 -1 -1 1 1 1 180 360 0 0 120 346 193

Correlation coefficient