as given in the qus, we need to calculate coefficient of correlation....but in the given one....i need to calculate rank correlation...plz ans this one through rank correlation of coefficient..

as given in the qus, we need to calculate coefficient of correlation....but in the given one....i need to calculate rank correlation...plz ans this one through rank correlation of coefficient.. ng Karl s given the following

Dear Student,
 
 X  Rank 1  Y  Rank 2  D = (R1-R2)  D2
 78  4  125  4  0  0
 89  2  137  3  -1  1
 97  1  156  1  0  0
 69  5  112  6  -1  1
 59  8  107  7  1  1
 79  3  106  8  -5  25
 68  6  123  5  1  1
 61  7  138  2  5  25
         Total  54

Rank Corelation = 1 - (6ΣD2) / N3 - N
                           = 1 - (6 x 54) / (83 - 8)
                           = 1 - 324/504
                           = 0.357 (aprox)

Regards

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