condition mean min max ZT0-3 1.006966 0.790177 1.2237550000000001 ZT4-7 0.663063 0.663063 0.663063 ZT8-11 1.132725 1.132725 1.132725 ZT12-15 0 0 0 ZT16-19 1.34174 1.34174 1.34174 ZT20-23 0.744152 0.744152 0.744152