condition mean min max ZT0-3 42.6117825 42.6117825 42.6117825 ZT4-7 34.28643 34.28643 34.28643 ZT8-11 30.08901 30.08901 30.08901 ZT12-15 62.365675 62.365675 62.365675 ZT16-19 10.6349085 10.6349085 10.6349085 ZT20-23 7.795407358333334 7.795407358333334 7.795407358333334