condition mean min max ZT0-3 0.159115649 0.13500580699999998 0.18322549100000002 ZT4-7 0.01275511875 0.0 0.0255102375 ZT8-11 1.053006288 0.009679225999999999 2.09633335 ZT12-15 4.926763791999999 3.7658294789999998 6.087698104999999 ZT16-19 3.8467233902499998 3.4001192209999997 4.2933275595 ZT20-23 0.857774556 0.529122131 1.1864269809999999