condition mean min max ZT0-3 0.34415406666666665 0.0176427 0.9409304999999999 ZT4-7 0.10502805 0.10502805 0.10502805 ZT8-11 0.09082470000000001 0.09082470000000001 0.09082470000000001 ZT12-15 0.730633475 0.23770894999999997 1.223558 ZT16-19 0.06911035 0.06911035 0.06911035 ZT20-23 0.09639045 0.09639045 0.09639045