condition mean min max ZT0-3 38.3 38.3 38.3 ZT4-7 36.0 36.0 36.0 ZT8-11 38.9 38.9 38.9 ZT12-15 24.85 24.85 24.85 ZT16-19 9.25 9.25 9.25 ZT20-23 58.75 58.75 58.75