condition mean min max ZT0-3 11.805043 11.805043 11.805043 ZT4-7 16.5676805 16.5676805 16.5676805 ZT8-11 35.8409 35.8409 35.8409 ZT12-15 29.798635 29.798635 29.798635 ZT16-19 17.544671 17.544671 17.544671 ZT20-23 11.340392999999999 11.340392999999999 11.340392999999999