given sample size n=10 , sum of squares of difference between two set of rank =20 . fund the rank correlation.
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1-6sigma d^2 /(n(n^2-1)
1-20/10x99 = (99-2)/99 =97/99 =.97
1-20/10x99 = (99-2)/99 =97/99 =.97
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