condition mean min max ZT0-3 162.75 162.75 162.75 ZT4-7 168.4 168.4 168.4 ZT8-11 167.0 167.0 167.0 ZT12-15 114.35000000000001 114.35000000000001 114.35000000000001 ZT16-19 72.05 72.05 72.05 ZT20-23 54.2 54.2 54.2