condition mean min max ZT0-3 69.1914849275 55.470292005000005 82.91267785 ZT4-7 27.471126964999996 25.054630335 29.887623594999997 ZT8-11 29.52306964 25.44587749 33.60026179 ZT12-15 25.19687236 23.981090275 26.412654445 ZT16-19 25.768630635 24.214843555 27.322417715 ZT20-23 34.93332617 34.08667031 35.77998203