I am writing my thesis in economics and trying to prove there is a correlation between 2 variables Data collected with Likert scale questionnaire (1-5 scale) I summed up the data and got scale variables which I used for testing the hypothesis.
Sample size is N=15 ( all 15 employees of the firm my research is based on). I am not sure wich method for correlation to use. I did Kolmogorov Smirnov test for normality of distribution and it appears the distribution is normal and that assumes the use of Pearson's correlation coefficient but I'm woried about small sample size. Should I use nonparametric mesaure such as Spearman coefficient or trust the Kolom.-Smirnov test ( I read that it should not be used when sample size iz less than 30)?? I should also state that I tried to run both test and both give positive corrleation( Pearson's is smaller than Spearman's)
Thanks in advance. :)