condition mean min max ZT0-3 29.950000000000003 29.950000000000003 29.950000000000003 ZT4-7 2.9 2.9 2.9 ZT8-11 5.15 5.15 5.15 ZT12-15 4.0 4.0 4.0 ZT16-19 43.15 43.15 43.15 ZT20-23 41.3 41.3 41.3