condition mean min max ZT0-3 0.4101958333333333 0.267266 0.61581 ZT4-7 0.29079849999999996 0.29079849999999996 0.29079849999999996 ZT8-11 0.4896895 0.4896895 0.4896895 ZT12-15 0.68065025 0.581342 0.7799585 ZT16-19 0.535369 0.535369 0.535369 ZT20-23 0.6877409999999999 0.6877409999999999 0.6877409999999999