condition mean min max ZT0-3 28.387 26.2636 30.5104 ZT4-7 29.1817 29.1817 29.1817 ZT8-11 27.8271 27.8271 27.8271 ZT12-15 0 0 0 ZT16-19 35.60055 35.60055 35.60055 ZT20-23 31.972500000000004 31.972500000000004 31.972500000000004