condition mean min max ZT0-3 52.46256666666666 29.6114 68.66385 ZT4-7 35.9235 35.9235 35.9235 ZT8-11 23.069 23.069 23.069 ZT12-15 29.83255 26.3054 33.359700000000004 ZT16-19 29.6189 29.6189 29.6189 ZT20-23 53.80745 53.80745 53.80745