condition mean min max ZT0-3 1.6285965 1.493833 1.76336 ZT4-7 0.653169 0.653169 0.653169 ZT8-11 1.253598 1.253598 1.253598 ZT12-15 0 0 0 ZT16-19 1.879825 1.879825 1.879825 ZT20-23 1.1207495 1.1207495 1.1207495