condition mean min max ZT0-3 31.261483333333334 21.644199999999998 40.34 ZT4-7 19.888550000000002 19.888550000000002 19.888550000000002 ZT8-11 35.546 35.546 35.546 ZT12-15 45.76135 43.59555 47.92715 ZT16-19 29.4524 29.4524 29.4524 ZT20-23 36.71065 36.71065 36.71065