condition mean min max ZT0-3 43.0 43.0 43.0 ZT4-7 9.8 9.8 9.8 ZT8-11 32.5 32.5 32.5 ZT12-15 10.3 10.3 10.3 ZT16-19 44.15 44.15 44.15 ZT20-23 6.25 6.25 6.25