condition mean min max ZT0-3 31.1364 24.84075 35.9494 ZT4-7 26.077849999999998 26.077849999999998 26.077849999999998 ZT8-11 27.7883 27.7883 27.7883 ZT12-15 30.7599 28.85035 32.66945 ZT16-19 27.596049999999998 27.596049999999998 27.596049999999998 ZT20-23 38.032799999999995 38.032799999999995 38.032799999999995