condition mean min max ZT0-3 44.79785258 40.481720609999996 49.11398455 ZT4-7 45.35668706 39.407432085 51.305942035 ZT8-11 87.87713432750002 66.29240527500001 109.46186338000001 ZT12-15 62.8863251725 41.445652585000005 84.32699776 ZT16-19 23.105387722499998 21.183716065 25.027059379999997 ZT20-23 18.471417959999997 18.23349364 18.709342279999998