Please, can someone advise me on how I can approach my nominal data and test its significance.
I measured jerking movement as a behavioural effect in a fish exposed to each of Chemical A and Chemical B at different concentrations (or treatments) based on below metrics:
No effect = 1 Low effect = 2 Moderate effect = 3 High effect = 4
I want to now evaluate if there is a significant difference between effect of Chemical A from B. This is how the data look: