condition mean min max ZT0-3 22.65 22.65 22.65 ZT4-7 11.8 11.8 11.8 ZT8-11 22.55 22.55 22.55 ZT12-15 45.25 45.25 45.25 ZT16-19 64.2 64.2 64.2 ZT20-23 41.8 41.8 41.8