What are various steps for the calculation of rank order correlation?

The following steps are as under for the calculation of rank order correlation:

(i) Copy the data related to X-Y variable given in the exercise and put them in the first and second column of the table.

(ii) Both the variables are to be ranked separately. The ranks of X-variable are to be recorded in third column headed by XR (Rank a/x). Similarly the ranks ofY-variables (YR) are to be recorded in the fourth column.

(iii) Now since both XR and YR have been obtained find the difference between two sets of ranks and record it in the fifth column.

(iv) Each of these difference is squared and sum of the column of square is obtained. This

value is placed in sixth column.

(v) Then the computation of the rank correlation is done by the application of the following equation :

Where P = Rank correlation

Σ D² = Sura of the squares of the difference between two sets of ranks.

N = The number of Pairs of X-Y.