condition mean min max ZT0-3 5.3912175 5.28908 5.493355 ZT4-7 2.68341 2.68341 2.68341 ZT8-11 1.26079 1.26079 1.26079 ZT12-15 0 0 0 ZT16-19 4.198945 4.198945 4.198945 ZT20-23 5.393785 5.393785 5.393785