condition mean min max ZT0-3 0.6834365 0.6266940000000001 0.7401789999999999 ZT4-7 0.472823 0.472823 0.472823 ZT8-11 1.4645299999999999 1.4645299999999999 1.4645299999999999 ZT12-15 0 0 0 ZT16-19 1.626725 1.626725 1.626725 ZT20-23 1.0658029999999998 1.0658029999999998 1.0658029999999998