condition mean min max ZT0-3 34.05 34.05 34.05 ZT4-7 7.7 7.7 7.7 ZT8-11 31.95 31.95 31.95 ZT12-15 48.45 48.45 48.45 ZT16-19 56.3 56.3 56.3 ZT20-23 49.2 49.2 49.2