condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0317768 0.0317768 0.0317768 ZT12-15 0.048852175 0.03167775 0.0660266 ZT16-19 0.0 0.0 0.0 ZT20-23 0.03337515 0.03337515 0.03337515