condition mean min max ZT0-3 24.54085 21.240949999999998 27.84075 ZT4-7 19.9182 19.9182 19.9182 ZT8-11 31.7589 31.7589 31.7589 ZT12-15 0 0 0 ZT16-19 37.9038 37.9038 37.9038 ZT20-23 31.96275 31.96275 31.96275