condition mean min max ZT0-3 0.22596103650000002 0.154042399 0.29787967400000004 ZT4-7 0.318945414 0.188339682 0.449551146 ZT8-11 1.285896918 0.7998992875 1.7718945485 ZT12-15 2.2618025375 1.8757360664999998 2.6478690085 ZT16-19 1.5770613955 1.2156519175 1.9384708735 ZT20-23 1.0003622975 0.9436323285 1.0570922665