condition mean min max ZT0-3 37.760579 37.760579 37.760579 ZT4-7 41.0803885 41.0803885 41.0803885 ZT8-11 57.21550549999999 57.21550549999999 57.21550549999999 ZT12-15 102.9813825 102.9813825 102.9813825 ZT16-19 40.620915 40.620915 40.620915 ZT20-23 110.23112699999999 110.23112699999999 110.23112699999999