condition mean min max ZT0-3 58.3174 54.1609 63.620599999999996 ZT4-7 40.04065 40.04065 40.04065 ZT8-11 19.77445 19.77445 19.77445 ZT12-15 22.9212 19.33115 26.51125 ZT16-19 27.6725 27.6725 27.6725 ZT20-23 41.07875 41.07875 41.07875