I am doing a quantitative case study on L2 phonological acquisition of a class of foreign language learners. It is a descriptive, quantitative case study that will give me the insights I need in order to design a quasi-experiment in the second part of my research. Anybody has any suggestions or ideas on quantitative case studies? The number of students in the class is 13, and I am submitting them to intensive phonetic testing. Giving the instruments of data colllection, I think that a quantitative analysis is suitable here. An additional question: I would like to use some sort of correlational analysis to study the realtionship between certain variables. Is it really worth it to use this type of statistical analysis with a sample of 13? As far as I know, if I want to use Pearson’s correlation, a normal distribution is required. In my case, the distribution of results presents a negative skew. Are there any other statistical toold that I could use with this type of distribution?