condition mean min max ZT0-3 19.5342 19.5342 19.5342 ZT4-7 27.9344 27.9344 27.9344 ZT8-11 26.59115 26.59115 26.59115 ZT12-15 15.8818 15.8818 15.8818 ZT16-19 12.44635 12.44635 12.44635 ZT20-23 13.040299999999998 13.040299999999998 13.040299999999998