condition mean min max ZT0-3 53.35 53.35 53.35 ZT4-7 46.6 46.6 46.6 ZT8-11 20.95 20.95 20.95 ZT12-15 45.05 45.05 45.05 ZT16-19 34.1 34.1 34.1 ZT20-23 60.7 60.7 60.7