condition mean min max ZT0-3 3.29124 3.13312 3.4493600000000004 ZT4-7 3.215235 3.215235 3.215235 ZT8-11 3.45854 3.45854 3.45854 ZT12-15 0 0 0 ZT16-19 3.30889 3.30889 3.30889 ZT20-23 4.054085 4.054085 4.054085