condition mean min max ZT0-3 0.39291000000000004 0.0 0.60174 ZT4-7 2.646105 2.646105 2.646105 ZT8-11 2.21198 2.21198 2.21198 ZT12-15 1.1509224999999998 1.1501199999999998 1.1517249999999999 ZT16-19 2.09953 2.09953 2.09953 ZT20-23 1.787055 1.787055 1.787055