condition mean min max ZT0-3 24.15 24.15 24.15 ZT4-7 17.6 17.6 17.6 ZT8-11 23.3 23.3 23.3 ZT12-15 51.3 51.3 51.3 ZT16-19 35.05 35.05 35.05 ZT20-23 25.6 25.6 25.6