condition mean min max ZT0-3 79.71818054250001 71.39895146500001 88.03740962 ZT4-7 38.97154475 36.808745845 41.134343655 ZT8-11 19.506285965 18.034444645 20.978127285 ZT12-15 11.739451169999999 10.5152402525 12.9636620875 ZT16-19 27.381651384999998 19.73780084 35.02550193 ZT20-23 53.7432142075 48.760249355 58.72617906