Hi guys, I would like to compare measures that are reported as percentages (with respect to a total) of cellular counts in 7 patients treated versus 7 patients untreated with a stimulating growth factor. I basically would like to compare the two distributions and assess, in a statistically significant way if the two distributions are equal or not. I already performed some test on normality and I verified if my data have equal variance or not and they have often a non normal distribution with 0s and they have unequal variance. Which statistical test should I use to compare the two populations? Thank you in advance.