condition mean min max ZT0-3 343.17066666666665 138.71800000000002 452.72249999999997 ZT4-7 135.8055 135.8055 135.8055 ZT8-11 98.92645 98.92645 98.92645 ZT12-15 209.32625000000002 184.185 234.4675 ZT16-19 360.092 360.092 360.092 ZT20-23 529.79 529.79 529.79