condition mean min max ZT0-3 44.45 44.45 44.45 ZT4-7 5.6 5.6 5.6 ZT8-11 45.3 45.3 45.3 ZT12-15 39.95 39.95 39.95 ZT16-19 29.1 29.1 29.1 ZT20-23 58.7 58.7 58.7