condition mean min max ZT0-3 0.31666475 0.2824425 0.350887 ZT4-7 0.071915 0.071915 0.071915 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 0.48659399999999997 0.48659399999999997 0.48659399999999997 ZT20-23 0.41941399999999995 0.41941399999999995 0.41941399999999995