condition mean min max ZT0-3 28.950000000000003 28.950000000000003 28.950000000000003 ZT4-7 29.8 29.8 29.8 ZT8-11 64.25 64.25 64.25 ZT12-15 47.3 47.3 47.3 ZT16-19 52.4 52.4 52.4 ZT20-23 46.75 46.75 46.75