condition mean min max ZT0-3 0.22495537450000003 0.21167173600000003 0.238239013 ZT4-7 0.3929030635 0.346941065 0.438865062 ZT8-11 0.76085383075 0.48654391350000004 1.035163748 ZT12-15 1.42122250575 1.1082582310000002 1.7341867805 ZT16-19 0.87595756625 0.782815221 0.9690999115 ZT20-23 1.29499251325 1.043532486 1.5464525405