condition mean min max ZT0-3 26.797625 25.2187 28.37655 ZT4-7 19.015900000000002 19.015900000000002 19.015900000000002 ZT8-11 19.281550000000003 19.281550000000003 19.281550000000003 ZT12-15 0 0 0 ZT16-19 26.1717 26.1717 26.1717 ZT20-23 24.989 24.989 24.989