condition mean min max ZT0-3 50.5696 43.56205 57.57715 ZT4-7 140.7726 140.7726 140.7726 ZT8-11 23.33495 23.33495 23.33495 ZT12-15 0 0 0 ZT16-19 28.5387 28.5387 28.5387 ZT20-23 91.1463 91.1463 91.1463