condition mean min max ZT0-3 32.273649999999996 29.0711 35.448499999999996 ZT4-7 22.82945 22.82945 22.82945 ZT8-11 31.70845 31.70845 31.70845 ZT12-15 31.8467 31.18785 32.50555 ZT16-19 22.9777 22.9777 22.9777 ZT20-23 29.91975 29.91975 29.91975