(a)(i)

Rank coefficient = I = \(\frac{6\sum d^2}{n(n^2 - 1)}\)
= 1 - \(\frac{6(141)}{10(10^2 - 1)}\)
= 1 - \(\frac{6(141)}{10 \times 99}\)
= 1 - \(\frac{846}{990}\)
= 1 - 0.85
= 0.15

(ii)

Rank coefficient = 1 - \(\frac{6(78)}{10(10^2 - 1)}\)
= 1 - \(\frac{468}{990}\)
= 1 - 0.472
= 0.53


(iii)



Rank coefficient = 1 - \(\frac{6(78)}{10(10^2 - 1)}\)
= 0.53

(b) Examiner II and III