condition mean min max ZT0-3 0.0108633995 0.0 0.021726799 ZT4-7 0.0 0.0 0.0 ZT8-11 0.05392363016666667 0.029984054333333333 0.077863206 ZT12-15 0.0120976485 0.0 0.024195297 ZT16-19 0.0 0.0 0.0 ZT20-23 0.076628133 0.05307905500000001 0.100177211