CIMA BA1 · Chapter 11 · Question 5 of 11
Two judges rank six products. The sum of the squared differences between their ranks is 10. What is Spearman's rank correlation coefficient (to three decimal places)?
Test yourself: pick an answer
Reveal answer & explanation
Correct answer: B) 0.714
Explanation
R = 1 - (6 x sum d squared) / (n(n squared - 1)) = 1 - (6 x 10) / (6 x 35) = 1 - 60 / 210 = 0.714. This indicates fairly strong agreement between the judges.
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