condition mean min max ZT0-3 20.607174999999998 17.966549999999998 23.247799999999998 ZT4-7 25.382649999999998 25.382649999999998 25.382649999999998 ZT8-11 48.6454 48.6454 48.6454 ZT12-15 0 0 0 ZT16-19 60.21985 60.21985 60.21985 ZT20-23 40.8875 40.8875 40.8875