TS ICET 24 May 2019 Shift 1 Paper

Question : 146 of 200

Marks: +1, -0

If the stun of the squares of the deviations of ranks of two students in seven subjects is 21, then the coefficient of rank correlation is:

Solution:

ρ=1-\;{6 ∑ d^{2}}/{n(n^{2}-1)}

=1-\;{6 × 21}/{7 × 48}=1-\;{3}/{8}=\;{5}/{8}

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