condition mean min max ZT0-3 35.2369 35.2369 35.2369 ZT4-7 41.18470000000001 41.18470000000001 41.18470000000001 ZT8-11 29.74725 29.74725 29.74725 ZT12-15 27.47055 27.47055 27.47055 ZT16-19 30.15315 30.15315 30.15315 ZT20-23 31.76755 31.76755 31.76755