condition mean min max ZT0-3 25.1886 25.1886 25.1886 ZT4-7 22.616100000000003 22.616100000000003 22.616100000000003 ZT8-11 22.48255 22.48255 22.48255 ZT12-15 22.3456 22.3456 22.3456 ZT16-19 24.0298 24.0298 24.0298 ZT20-23 23.610799999999998 23.610799999999998 23.610799999999998