condition mean min max ZT0-3 0.21400390725000001 0.1317111625 0.296296652 ZT4-7 0.6209182995 0.25059868949999997 0.9912379095000001 ZT8-11 2.29173996075 1.8509191944999999 2.732560727 ZT12-15 4.62877522275 3.6634322135 5.594118232 ZT16-19 5.317495575500001 5.312072261000001 5.32291889 ZT20-23 5.33784812575 5.1027329224999995 5.572963329