condition mean min max ZT0-3 0.29659564875 0.083973875 0.5092174225 ZT4-7 1.5593811784999998 1.4751471564999998 1.6436152005 ZT8-11 1.677530142 1.4280758015 1.9269844825 ZT12-15 2.6694587194999997 2.470986032 2.867931407 ZT16-19 3.1135542707500004 2.8797629990000004 3.3473455425000003 ZT20-23 3.8560306417500003 3.7590162080000002 3.9530450755000004