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WAEC Further Mathematics 2016 Question 31

Question 31

Statistics

Given that n = 10 and Σd2 = 20, calculate the spearman's rank correlation coefficient.

  1. A.0.121
  2. B.0.733
  3. C.0.879
  4. D.0.979
Show the answer and explanation

Answer: C (0.879)

Explanation

ρ = 1 − 6(20)/(10 × 99) = 1 − 120/990 ≈ 0.879.