Question

The coefficiently rank correlation is 0.75 and the sum of the squares of the difference in rank is 30, then find the value of V.

Answer 1

Given: p = 0.75, Σd² = 30

  

\(\frac{180}{0.25}\) = n³ – n 720 = n³ – n

9 × 80 = n(n² – 1) 9(81 – 1) = n(n² – 1)

9(9² – 1) = n(n² – 1) 

∴ n= 9