condition mean min max ZT0-3 1025.263102 1025.263102 1025.263102 ZT4-7 714.4980845 714.4980845 714.4980845 ZT8-11 789.756164 789.756164 789.756164 ZT12-15 917.2347105 917.2347105 917.2347105 ZT16-19 1106.5263775 1106.5263775 1106.5263775 ZT20-23 913.4177709999999 913.4177709999999 913.4177709999999