condition mean min max ZT0-3 36.55 36.55 36.55 ZT4-7 37.4 37.4 37.4 ZT8-11 25.5 25.5 25.5 ZT12-15 25.8 25.8 25.8 ZT16-19 20.45 20.45 20.45 ZT20-23 51.9 51.9 51.9