condition mean min max ZT0-3 0.11075883333333333 0.0484255 0.213663 ZT4-7 0.0889941 0.0889941 0.0889941 ZT8-11 0.06950714999999999 0.06950714999999999 0.06950714999999999 ZT12-15 0.04700409999999999 0.0231554 0.0708528 ZT16-19 0.02243495 0.02243495 0.02243495 ZT20-23 0.0 0.0 0.0