condition mean min max ZT0-3 11.881049999999998 11.881049999999998 11.881049999999998 ZT4-7 10.10225 10.10225 10.10225 ZT8-11 10.314385000000001 10.314385000000001 10.314385000000001 ZT12-15 8.797885 8.797885 8.797885 ZT16-19 13.6111 13.6111 13.6111 ZT20-23 10.04307 10.04307 10.04307