condition mean min max ZT0-3 1.3563364999999998 0.519488 2.1931849999999997 ZT4-7 0.3932285 0.3932285 0.3932285 ZT8-11 1.0506495 1.0506495 1.0506495 ZT12-15 0 0 0 ZT16-19 0.992027 0.992027 0.992027 ZT20-23 0.7370509999999999 0.7370509999999999 0.7370509999999999