i have 4 numerical variables ( 4 type of boats )and 1 nominal variable ( dolphins behaviour wether eating or social or resting and other) and i want to know if these boat affecting these behaviour and which boat is the most significant one i mean which boat is the most annoying to the dolphins and i don't know which test to use alll my boats had non normal distribution and i know i have to use non parametric test but am not sure which one ////????????????????