condition mean min max ZT0-3 39.278549999999996 31.8685 46.688599999999994 ZT4-7 54.0028 54.0028 54.0028 ZT8-11 63.69285 63.69285 63.69285 ZT12-15 0 0 0 ZT16-19 78.3637 78.3637 78.3637 ZT20-23 59.05645 59.05645 59.05645