condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.057758000000000004 0.057758000000000004 0.057758000000000004 ZT12-15 0.04745083333333333 0.034918 0.059983666666666664 ZT16-19 0.0 0.0 0.0 ZT20-23 0 0 0