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Thanks a lot for your kind help!

The groups are four different types of profession. I have a total of 208 subjects, and between 30 and 80 subjects in each group. I have question scores for each subject, but only a mean performance score for each group. I want to see if high question score corresponds to high performance score...

Thank you for your response! Yes, it is the means of the groups. I want to explore if there is a relationship between the responses from my questionnaire (eg mean score from question 1 for each of my 4 groups) and the performance indicator (eg score on a test) for each group.

I am trying to correlate responses from a questionnaire with performance data. The respondents are divided into 4 groups. I planned to use Spearman's rho correlation, but all the tables I have seen do not list critical values for N less than 5. Is Spearman's rho still a valid method for...