condition mean min max ZT0-3 30.252116666666666 21.29375 34.734049999999996 ZT4-7 14.28055 14.28055 14.28055 ZT8-11 7.642955000000001 7.642955000000001 7.642955000000001 ZT12-15 13.021825 11.473 14.57065 ZT16-19 14.3657 14.3657 14.3657 ZT20-23 21.587699999999998 21.587699999999998 21.587699999999998