condition mean min max ZT0-3 152.75 152.75 152.75 ZT4-7 141.0 141.0 141.0 ZT8-11 162.55 162.55 162.55 ZT12-15 139.5 139.5 139.5 ZT16-19 174.2 174.2 174.2 ZT20-23 196.9 196.9 196.9