condition mean min max ZT0-3 27.592222223333334 27.592222223333334 27.592222223333334 ZT4-7 27.535 27.535 27.535 ZT8-11 49.04444444666667 49.04444444666667 49.04444444666667 ZT12-15 50.818888890000004 50.818888890000004 50.818888890000004 ZT16-19 46.10222222 46.10222222 46.10222222 ZT20-23 35.68888889 35.68888889 35.68888889