condition mean min max ZT0-3 75.35 75.35 75.35 ZT4-7 127.9 127.9 127.9 ZT8-11 108.9 108.9 108.9 ZT12-15 122.45 122.45 122.45 ZT16-19 136.3 136.3 136.3 ZT20-23 91.6 91.6 91.6