condition mean min max ZT0-3 0.78209492075 0.7155815729999999 0.8486082685 ZT4-7 0.34476917149999997 0.33828150149999997 0.3512568415 ZT8-11 1.2343894665000001 0.57017713 1.898601803 ZT12-15 3.09372594625 2.588984375 3.5984675175 ZT16-19 2.8336126225 2.6709182225 2.9963070225 ZT20-23 2.139068343 2.1269163535 2.1512203325