Put all the scores that you want to rank into numerical order from the samllest to the largest.For example if the scores were as follows:
28 20 17 23 31 22 15 39 30 31 30
The they would appear like this:
15 17 20 22 23 28 30 30 31 31 39
Now you need to give each score a rank, the lowest score should get 1 and the highest should get 11 as there are 11 scores in total. If there are two scores the same, they should get the median average of the ranks they have been assigned. So ….
And its as simple as that 🙂
Make sure when you calculate the rest of the test using the Pps ranks instead of their actual scores, you write the ranks carefully into your data table in the correct places.
Also you need to follow the rules of test with care sometimes all scores are ranked together as one set as in the Mann Whitney, but in a Spearman’s, we rank each set of data from each co-variable separately. Take care!
Also, too many tied ranks can invalidate the results of some stats tests, usually any more than 5 is frowned upon! This can be checked elsewhere for current best practice.