condition mean min max ZT0-3 22.0 22.0 22.0 ZT4-7 5.2 5.2 5.2 ZT8-11 20.9 20.9 20.9 ZT12-15 26.45 26.45 26.45 ZT16-19 40.45 40.45 40.45 ZT20-23 8.45 8.45 8.45