condition mean min max ZT0-3 200.25 200.25 200.25 ZT4-7 221.3 221.3 221.3 ZT8-11 239.5 239.5 239.5 ZT12-15 231.05 231.05 231.05 ZT16-19 277.8 277.8 277.8 ZT20-23 220.2 220.2 220.2