condition mean min max ZT0-3 34.831450000000004 34.831450000000004 34.831450000000004 ZT4-7 30.35905 30.35905 30.35905 ZT8-11 19.7042 19.7042 19.7042 ZT12-15 16.85465 16.85465 16.85465 ZT16-19 22.66605 22.66605 22.66605 ZT20-23 31.710250000000002 31.710250000000002 31.710250000000002