condition mean min max ZT0-3 33.9794 27.61905 40.0724 ZT4-7 36.050200000000004 36.050200000000004 36.050200000000004 ZT8-11 33.93075 33.93075 33.93075 ZT12-15 40.29095 39.48375 41.098150000000004 ZT16-19 31.626849999999997 31.626849999999997 31.626849999999997 ZT20-23 36.64655 36.64655 36.64655