condition mean min max ZT0-3 37.901650000000004 37.901650000000004 37.901650000000004 ZT4-7 38.218199999999996 38.218199999999996 38.218199999999996 ZT8-11 33.02425 33.02425 33.02425 ZT12-15 29.96185 29.96185 29.96185 ZT16-19 31.301 31.301 31.301 ZT20-23 33.843450000000004 33.843450000000004 33.843450000000004