In my study 20 animals, right limb i created defect. After 1 month I divided that into 2 groups based on removal group A (n=10) removed by novice surgeon, group B (n=10) removed by experienced surgeon and similarly contralateral limb un-operated removed by novice surgeon (n=10) as group A* and contralateral limb (not-operated) removed by experienced surgeon as group B* (n=10). So kindly suggest me which statistical test would be appropriate for parametric and non-parametric data