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9:30 From the following bivariate frequency distribu- tion, calculate (i) the cocfficient of correlation and (ii) the regression equation of marks (y) on age (x)

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9:30 From the following bivariate frequency distribu- tion, calculate (i) the cocfficient of correlation and (ii) the regression equation of marks (y) on age (x) - Age (years) 15-20 20-25 25-30 30-35 Total 35-40 0-19 4 2 6 20_39 6 S 3 1 15 Marks 4059 9 4 2 1 1 16 6079 7 4 1 12 80-99 1 1 Total 10 23 12 4 1 50

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