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puts "Enter Number of Data Set" n=gets.chomp n=n.to_f sum_d=0 i=0 while i<n i=i+1 puts "For Set "+i.to_s puts "Rank of Group 1" r1=gets.chomp r1=r1.to_f puts "Rank of Group 2" r2=gets.chomp r2=r2.to_f diff=r1-r2 d=diff**2 sum_d=sum_d+d end r=1-(6*sum_d)/(n*(n**2-1)) puts "Coefficient of Rank Correlation "+r.to_s