condition mean min max ZT0-3 157.185872 157.185872 157.185872 ZT4-7 266.4405845 266.4405845 266.4405845 ZT8-11 237.22307700000002 237.22307700000002 237.22307700000002 ZT12-15 162.6634825 162.6634825 162.6634825 ZT16-19 138.24194 138.24194 138.24194 ZT20-23 153.7705185 153.7705185 153.7705185