condition mean min max ZT0-3 43.05 43.05 43.05 ZT4-7 23.6 23.6 23.6 ZT8-11 40.2 40.2 40.2 ZT12-15 21.9 21.9 21.9 ZT16-19 19.05 19.05 19.05 ZT20-23 36.9 36.9 36.9