condition mean min max ZT0-3 32.67945 32.526849999999996 32.83205 ZT4-7 34.20305 34.20305 34.20305 ZT8-11 34.13145 34.13145 34.13145 ZT12-15 0 0 0 ZT16-19 38.1429 38.1429 38.1429 ZT20-23 32.3711 32.3711 32.3711