condition mean min max ZT0-3 164.6 164.6 164.6 ZT4-7 129.6 129.6 129.6 ZT8-11 160.0 160.0 160.0 ZT12-15 159.3 159.3 159.3 ZT16-19 119.5 119.5 119.5 ZT20-23 121.25 121.25 121.25