condition mean min max ZT0-3 184.74325 162.08 207.4065 ZT4-7 188.2905 188.2905 188.2905 ZT8-11 120.3955 120.3955 120.3955 ZT12-15 0 0 0 ZT16-19 105.1485 105.1485 105.1485 ZT20-23 179.5125 179.5125 179.5125