condition mean min max ZT0-3 0.28201875 0.2489495 0.31508800000000003 ZT4-7 0.46055999999999997 0.46055999999999997 0.46055999999999997 ZT8-11 0.39059350000000004 0.39059350000000004 0.39059350000000004 ZT12-15 0 0 0 ZT16-19 0.523325 0.523325 0.523325 ZT20-23 0.16802399999999998 0.16802399999999998 0.16802399999999998