condition mean min max ZT0-3 171.1 171.1 171.1 ZT4-7 89.8 89.8 89.8 ZT8-11 84.75 84.75 84.75 ZT12-15 138.8 138.8 138.8 ZT16-19 191.7 191.7 191.7 ZT20-23 202.3 202.3 202.3