condition mean min max ZT0-3 0.68849246775 0.5616873605 0.815297575 ZT4-7 1.81095318475 1.0792050595 2.54270131 ZT8-11 5.316718427750001 3.5821572285 7.051279627 ZT12-15 16.89729666825 14.061488761499998 19.733104575 ZT16-19 18.5198866725 18.228489765 18.81128358 ZT20-23 23.416391072499998 22.25812956 24.574652585