condition mean min max ZT0-3 34.4150808145 18.805831859 50.02432977 ZT4-7 5.224719235249999 2.9229396989999996 7.5264987715 ZT8-11 1.090488192 0.909301268 1.271675116 ZT12-15 46.386143507750006 30.6937684705 62.07851854500001 ZT16-19 65.85656147 55.469755035 76.243367905 ZT20-23 121.654000855 85.92822941 157.3797723