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Statistics/Testing Data/Spearmans
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Spearman Rank- Correlation coefficient
Spearman developed a method of measuring rank correlation known as spearman rank correlation coefficient. It is generally denoted by rs. There are three cases while calculating Spearman rank correlation coefficient:
Case i When ranks are given
Case ii When ranks are not given
Case iii Repeated ranks
The formula for calculating Spearman rank correlation coefficient is same for case i and ii. The formula is,
Where,
n = The number of items or individuals being ranked
d =
= The rank of items with respect to first variable
= The rank of items with respect to second variable