condition mean min max ZT0-3 15.35393482525 7.843643613500001 22.864226037 ZT4-7 33.57868152666667 32.28737435 34.869988703333334 ZT8-11 35.176807065 34.51454988 35.83906425 ZT12-15 34.0237093 31.526558763333334 36.520859836666666 ZT16-19 27.3729978 26.44336011 28.30263549 ZT20-23 24.85271726 23.68860405 26.01683047