condition mean min max ZT0-3 0.20846350000000002 0.20846350000000002 0.20846350000000002 ZT4-7 0.11744065 0.11744065 0.11744065 ZT8-11 0.248842 0.248842 0.248842 ZT12-15 0.178419 0.178419 0.178419 ZT16-19 0.6559094999999999 0.6559094999999999 0.6559094999999999 ZT20-23 0.37639500000000004 0.37639500000000004 0.37639500000000004