condition mean min max ZT0-3 0.20825100000000002 0.105961 0.310541 ZT4-7 1.8198249999999998 1.8198249999999998 1.8198249999999998 ZT8-11 0.860537 0.860537 0.860537 ZT12-15 0 0 0 ZT16-19 0.2091415 0.2091415 0.2091415 ZT20-23 0.7334425 0.7334425 0.7334425