condition mean min max ZT0-3 48.7031797925 47.827407335000004 49.57895225 ZT4-7 48.571899083333335 46.30046249333333 50.843335673333335 ZT8-11 50.006082195000005 49.14849564 50.86366875 ZT12-15 46.47770065 43.70345046 49.25195084 ZT16-19 52.877743785 49.67934711 56.07614046 ZT20-23 59.79181781 58.53609464666667 61.047540973333334