condition mean min max ZT0-3 131.95 131.95 131.95 ZT4-7 35.8 35.8 35.8 ZT8-11 48.95 48.95 48.95 ZT12-15 99.5 99.5 99.5 ZT16-19 127.9 127.9 127.9 ZT20-23 120.3 120.3 120.3