condition mean min max ZT0-3 64.8688 64.8688 64.8688 ZT4-7 60.393550000000005 60.393550000000005 60.393550000000005 ZT8-11 41.2589 41.2589 41.2589 ZT12-15 44.950500000000005 44.950500000000005 44.950500000000005 ZT16-19 58.111149999999995 58.111149999999995 58.111149999999995 ZT20-23 52.179950000000005 52.179950000000005 52.179950000000005