condition mean min max ZT0-3 42.45 42.45 42.45 ZT4-7 65.7 65.7 65.7 ZT8-11 52.2 52.2 52.2 ZT12-15 45.7 45.7 45.7 ZT16-19 25.1 25.1 25.1 ZT20-23 22.9 22.9 22.9