condition mean min max ZT0-3 24.85318 24.85318 24.85318 ZT4-7 28.239864500000003 28.239864500000003 28.239864500000003 ZT8-11 27.155482 27.155482 27.155482 ZT12-15 31.2784185 31.2784185 31.2784185 ZT16-19 44.3539765 44.3539765 44.3539765 ZT20-23 39.417703 39.417703 39.417703