AP ICET 2017 Shift 1 Paper

Question : 146 of 200

Marks: +1, -0

If the sum of the squares of the deviations in 9 observations is 5 then the coefficient of rank correlation of them is

Solution:

Coefficient of rank correlation

=1-{6Σd_i^2}/{n(n^2-1)}

=1-{6×5}/{9(9^{2}-1)}=1-{30}/{9×80}=1-{1}/{24}={23}/{24}

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