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{"ops":[{"insert":"A computer while calculating correlation coefficient between two variables X and Y from 25 pairs of observations obtained the following results : n=25, \u2211 X= 125, \u2211 X^2=650, \u2211 Y=100, \u2211 Y^2= 460, \u2211 XY =508. If was, however, later discovered at the time of checking that he had copied down two pairs as (X,Y)= (6,14),(8,6) while the correct values were (X,Y)=(8,12),(6,8).\nObtain the correct value of correlation co-efficient.\n"}]}
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