condition mean min max ZT0-3 0.5613453333333334 0.5322935 0.602729 ZT4-7 0.21799949999999998 0.21799949999999998 0.21799949999999998 ZT8-11 0.2266235 0.2266235 0.2266235 ZT12-15 0.40390825 0.39792150000000004 0.409895 ZT16-19 0.286895 0.286895 0.286895 ZT20-23 1.0444795 1.0444795 1.0444795