The coefficient of rank correlation of the marks obtained by 10 students in statistics and acountancy was found to be 0.8. It was later discovered that the difference in ranks in the two subjects obtained by one of the students was wrongly taken as 7 instead of 9. The correct coefficient of rank correlation is : (a) 0.51 (b) 0.61 (c) 0.75 (d) 0.55
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It was later discovered that the difference in ranks in the two subjects obtained was wrongly taken 3 instead of 7. Find the correct coefficient of rank of correlation. Corrected ∑d² = 82.5 - 3² +7² = 82.5-9+49 = 122.5. ... The correct coefficient of rank of correlation is 0.2576.
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