I have been doing the following experiment:
I have recorded the startle amplitudes triggered by two different sounds - this is for one nice little rat called Roger. The sounds (12x S1 and 12x S2) were randommly distributed like this:
S1 - S1 - S1 - S2 - S2 - S1 - S2 - S2 - S2 - S1 - S2 - S1 - S1 - S2 - S1 - S1 - S2 etc...up to 24 sounds in total.
I want to check if there is a difference between the startle amplitudes triggered by S1 and the ones triggered by S2.
Both population do not follow normality hence non-parametric test.
Because the data are from the same animal, I did the Wilcoxon signed-rank test (paired test).
Am I right? If not, could you explain why? Many thanks