condition mean min max ZT0-3 87.9 87.9 87.9 ZT4-7 99.8 99.8 99.8 ZT8-11 150.5 150.5 150.5 ZT12-15 127.6 127.6 127.6 ZT16-19 161.75 161.75 161.75 ZT20-23 204.45 204.45 204.45