following are the scores obtained by a group of student on english and maths test find out the correlation between the two set of scores using rank differences method
student A,B,C,D,E,F,G,H,I,J,K,L
english test 46,53,40,47,41,36,39 40,46 51,53,40
ranks 61,57,61,60,63,69,68,70,61,55,56,58
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