condition mean min max ZT0-3 2.1380192915 1.340011685 2.936026898 ZT4-7 1.2657868782500001 0.2594260025 2.272147754 ZT8-11 0.20920607325 0.073374788 0.34503735850000006 ZT12-15 84.890506218 77.272870231 92.508142205 ZT16-19 93.13647116 71.8462888 114.42665352 ZT20-23 52.6016357475 44.796739845 60.406531650000005