condition mean min max ZT0-3 73.75085 48.5349 114.309 ZT4-7 102.62155 102.62155 102.62155 ZT8-11 42.56725 42.56725 42.56725 ZT12-15 46.628775 43.547799999999995 49.70975 ZT16-19 38.297250000000005 38.297250000000005 38.297250000000005 ZT20-23 37.513400000000004 37.513400000000004 37.513400000000004