condition mean min max ZT0-3 300.859552 300.859552 300.859552 ZT4-7 104.88748799999999 104.88748799999999 104.88748799999999 ZT8-11 96.96925049999999 96.96925049999999 96.96925049999999 ZT12-15 118.3631905 118.3631905 118.3631905 ZT16-19 174.5450495 174.5450495 174.5450495 ZT20-23 136.4852785 136.4852785 136.4852785