condition mean min max ZT0-3 13.189595072499998 10.33181473 16.047375414999998 ZT4-7 23.07414186 20.056447400000003 26.09183632 ZT8-11 27.469614784999997 24.61798778 30.32124179 ZT12-15 28.40489946 28.325189445 28.484609475 ZT16-19 29.9221851075 29.055878195 30.78849202 ZT20-23 47.8007644375 42.479104985 53.12242389