condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.060286751250000006 0.0 0.12057350250000001 ZT16-19 0.1350717735 0.09689883 0.173244717 ZT20-23 0.03915998225 0.0 0.0783199645