condition mean min max ZT0-3 0.21485575 0.1831605 0.246551 ZT4-7 0.24490050000000002 0.24490050000000002 0.24490050000000002 ZT8-11 0.30815499999999996 0.30815499999999996 0.30815499999999996 ZT12-15 0 0 0 ZT16-19 0.303128 0.303128 0.303128 ZT20-23 0.0606515 0.0606515 0.0606515