condition mean min max ZT0-3 87.24045000000001 87.24045000000001 87.24045000000001 ZT4-7 66.7433 66.7433 66.7433 ZT8-11 61.83369999999999 61.83369999999999 61.83369999999999 ZT12-15 51.1729 51.1729 51.1729 ZT16-19 46.9999 46.9999 46.9999 ZT20-23 63.32 63.32 63.32