condition mean min max ZT0-3 0.00201093675 0.0 0.0040218735 ZT4-7 0.04128169025 0.0404400065 0.042123374000000005 ZT8-11 0.541590304 0.33664288449999996 0.7465377235 ZT12-15 1.08086391375 0.959078944 1.2026488835 ZT16-19 0.49244370225 0.43085741850000003 0.554029986 ZT20-23 0.4362345165 0.380789095 0.49167993800000004